Another leal privatiser, Nigel Lawson, a minister in the Thatcher government from the beginning almost to the end, dismissed the idea that the government cared about the price it was getting for selling off the family silver. Having many ordinary people owning shares, he writes in his memoirs, was the point. "The prime motives for privatisation were not Exchequer gain," he declares, "but an ideological belief in free markets and a wider distribution of private ownership of property."

Neither Walters nor Lawson, nor other allies like Keith Joseph, the ex-communist Alfred Sherman or Nicholas Ridley, would have been able to implement their ideas without Thatcher herself, her extraordinary sense of the way the political wind was blowing, her conviction of her own rectitude, and the stamina and persistence with which she was able to go on insisting on something until her opponents in government gave in. Hers was a different emphasis to Walters, who saw the curbing of "bloody-minded trades unions" as a useful side effect of privatisation. For Thatcher, privatisation, in the beginning at least, was simply one of many weapons to use in her battle against the unions, which was, in turn, a single episode in her war to exterminate socialism, to be fought in one unbroken front from Orgreave Colliery to Andrei Sakharov's place of exile in Gorky. Her great political inspiration, apart from her father, was the Austrian economist Friedrich Hayek's 1944 book, The Road to Serfdom, written in Cambridge during the war. Hayek was regarded as an able economist; he eventually won a Nobel prize for it. But The Road to Serfdom isn't an economics book. It's a book about society, the recent past and human nature that bears the same relation to sociology, history and psychology as Ayn Rand's Atlas Shrugged bears to literature. It is devoted to the idea that Winston Churchill later nodded to, catastrophically for him, in the 1945 election campaign, when he said Labour would have to fall back on "some form of Gestapo" to implement its welfare and nationalisation programme. Churchill was thrown out of office, and Labour won a huge majority.

The Road to Serfdom claims that socialism inevitably leads to communism, and that communism and Nazi-style fascism are one and the same. The tie that links Stalin's USSR and Hitler's Germany, in Hayek's view, is the centrally planned economy – as he portrays it, the attempt by a single central bureaucracy to direct all human life, to determine all human needs in advance and organise provision, limiting each to their rationed dole and their allotted task. Such a bureaucracy will no more tolerate dissent and deviation than the engineers tending a vast production line will accept a pebble jamming the gears. Confusingly, Hayek denies he is a pure libertarian, and declares the free market must have rules; he also says it is acceptable for government to "provide an extensive system of social services". Yet this is in contradiction to his main message, which is that there can be no mixture of state planning and free market competition. To him they are mutually exclusive. "By the time Hitler came to power, liberalism was dead in Germany," he writes. "And it was socialism that had killed it." Even to try to make socialism work, according to Hayek, is dangerous: "in the democracies the majority of people still believe that socialism and freedom can be combined. They do not realise that democratic socialism, the great utopia of the last few generations, is not only unachievable, but that to strive for it produces something utterly different – the very destruction of freedom itself."

Hayek was proven wrong. As in other western European countries, socialists came and went from power in Britain, introduced a welfare state and took control of large swathes of the economy without democracy and individual freedoms being threatened. The NHS was set up, council houses were built, social security was established, state education was expanded, coal, rail and steel nationalised, yet despite all the planning this required, millions of private businesses, small, medium and large, carried on merrily competing (or co-operating) with each other, flourishing or going to the wall as the market determined. Private doctors kept their clinics on Harley Street, young aristos still ruggered their way across the playing fields of Eton, the private shop windows of Harrods still blazed forth at Christmas time. Bankers and stockbrokers thronged the City, and the farmers owned their land. No one was forced by the government to live in a particular place or do a particular job. There was an argument to be made about how much tax people and businesses paid, and how much of that money government would have been better letting them choose for themselves how to spend. The argument was made, and will always be made; in the end, neither the Gestapo, nor the English Hitler, nor the English Politburo appeared, or looked like appearing.

Hayek's work, that of a frightened refugee in wartime, in the blackouts and shortages of a besieged island, had been superseded by the 1970s. A better framework for understanding the Britain of the time would have been the American Daniel Bell's masterful introduction to his 1976 book The Cultural Contradictions of Capitalism, where, though he spoke in general terms, he seemed to capture the actual contemporary problems of the UK: "A system of state capitalism could easily be transformed into a corporate state … a cumbersome, bureaucratic monstrosity, wrenched in all directions by the clamour for subsidies and entitlements by various corporate and communal groups, yet gorging itself on increased governmental appropriations to become a Leviathan in its own right." Thatcher, however, never stopped seeing the world through a Hayekian prism. After she defeated the attempt by Britain's coal miners to stave off mass redundancies and pit closures by downing tools, she wrote: "What the strike's defeat established was that Britain could not be made ungovernable by the Fascist Left."

About 10 years ago, I began to investigate what happened after the early Thatcherite zeal took effect. I was sceptical when I began my inquiries, but I was prepared to be convinced that privatisation in these half-dozen cases had been a success. I learned that it has not. Privatisation failed to turn Britain into a nation of small shareholders. Before Thatcher came to power, almost 40% of the shares in British companies were held by individuals. By 1981, it was less than 30%. By the time she died in 2013, it had slumped to under 12%. What is significant about this is not only that Thatcher and her chancellor Nigel Lawson's vision of a shareholding democracy failed to come to pass through privatisation, but that it undermines the justification for the way the companies were taken out of public ownership.

There's no doubt that since privatisation the old nationalised industries have sacked colossal numbers of workers and brought in new technology. If efficiency is doing the same job or better with fewer workers, many of the privatised firms are more efficient. But this simply suggests some or all of the nationalised industries should have been commercialised – that is, had their subsidies shrunk and been removed from direct government control, obliging them to borrow money at commercial rates and operate in a world of market prices without making a loss. Apart from the failed attempt to encourage wider share ownership, there was no obvious reason to privatise them by floating them on the stock market and selling them to shareholders. There are many forms of private ownership. The department store chain John Lewis, an unsubsidised commercial firm in a fiercely competitive market, is owned by its employees. The Nationwide Building Society, an unsubsidised commercial firm in a fiercely competitive market, is owned by its members. The Guardian Media Group, an unsubsidised commercial firm in a fiercely competitive market, is owned by a trust set up to support its journalistic values and protect it from hostile takeover. And so on. None of the many alternatives to stock market flotation were put up for discussion by either side: it was either shareholder capitalism or the nationalised status quo.

Privatisation failed to demonstrate the case made by the privatisers that private companies are always more competent than state-owned ones – that private bosses, chasing the carrot of bonuses and dodging the stick of bankruptcy, will always do better than their state-employed counterparts. Through euphemisms such as "wealth creation" and "enjoying the rewards of success" Thatcher and her allies have promoted the notion that greed on the part of a private executive elite is the chief and sufficient engine of prosperity for all. The result has been 35 years of denigration of the concept of duty and public service, as well as a squalid ideal of all work as something that shouldn't be cared about for its own sake, but only for the money it brings. The magic dust of the market was of little use to the bosses of the newly privatised Railtrack in the mid-1990s. They thought they could sack people with impunity – not just signalling and maintenance staff but expert engineers and researchers – and carry out a massive line-upgrade cheaply with the most advanced new technology. Unfortunately the people who could have told them that the new technology didn't exist were the people they had sacked. As a result, the company went bust in 2002, and had to be renationalised.

Privatisation failed to make firms compete or give customers more choice – said to be the canonical virtues of privatisation. Pretty hard, you would think, to privatise water companies, when they are all monopolies, with nobody to compete with, and can't offer customers a choice – neither the choice of which supplier to use nor the choice of whether to take a service or not. And yet the English water companies were privatised, and in such a way that customers have been overcharged ever since. The privatisers loved competition, but the actual privatised competitors hate it. The competitive vision of those who designed Britain's electricity privatisation – a rumbustious, referee-supervised free-for-all between sellers and makers of electricity old and new, large and small – has degenerated into an opaque oligopoly of a handful of giant players.

The impression grows, on reading Thatcher's autobiography, that she believed the transformational effect of privatisation was such as to turn executives into self-consciously moral, patriotic, civically minded entrepreneurs like her father; as if a monopoly on water supply for several million people were a local grocery shop in a small English town in the 1940s. Privatisation, she claimed, was "the greatest shift of ownership and power away from the state to individuals and their families in any country outside the former communist bloc". The reality is that the faceless state bureaucrats of the old electricity boards have been replaced by the faceless (and better paid) private bureaucrats of the electricity companies. Not only are the privatised utilities big, remote corporations; most of them are no longer British, and no longer owned by small shareholders. Indeed electricity and water privatisation could not have failed more absolutely to foster the emergence of world-beating, innovative British companies.

Most of the electricity made and sold in England is now owned by dynamic, tech-savvy companies from western Europe, a region doomed, Thatcher thought, by creeping socialism. As a direct result of the way electricity was privatised, much of it has now been renationalised – but by France, not Britain. Of the nine big English water and sewerage firms, six have achieved the seemingly impossible feat of being privatised a second time, delisted from the stock market by east Asian conglomerates or by private equity consortia. Today much of England's water industry is, it is true, in the hands of individuals and their families, but they don't use English water; they are millions of former civil servants in Canada, Australia and the Netherlands, investing, unwittingly, through their pension funds. The National Health Service is a special case. It hasn't been privatised, and the political parties vie with each other to show that it's safest in their hands.

Yet it has been commercialised and repeatedly reorganised, with competition introduced, in such a way as to create a kind of shadowing of an as-yet-unrealised private health insurance system. The story of the transformation of the NHS is part of the wider story of the inheritance of the Thatcher legacy by a Blairite Labour administration over-filled with politicians who struggled to separate their ambitions for Britain from their ambitions for their own and their families' ascent into the six-figure-income class. After their Sisyphean struggles with the Tories and the conservative socialists in their own party, New Labour in power yielded with all too apparent relief to the charms of the business world. It wasn't the creation of foundation trusts for hospitals – or academy schools, or support for housing associations – that was the mistake, rather a lack of awareness that without elaborate safeguards these structures might prove mere waypoints to the next set of privatisations.

What the story of the latter years of the NHS shows is that the most powerful market force eating away at the core of the welfare state is not so much capitalism as consumer capitalism – the convergence of desires between the users of a public service and the private companies providing it when the companies use the skills of marketing to give users a sense of dissatisfaction and peer disadvantage. "If consumption represents the psychological competition for status," writes Daniel Bell, "then one can say that bourgeois society is the institutionalisation of envy." Hip replacement, a procedure invented within the NHS by John Charnley, began as a blessed relief from pain for which patients were, as Charnley said, pathetically grateful. It rapidly progressed to a rationed entitlement. It has now become a competitive market.

This points to a difficulty for anti-marketeers. Since 1945, even if privatisation had never happened, socialism would have struggled with the move from a world of unsatisfied needs to a more complex world of unsatisfied wants.

The selling off of Britain's municipal housing without replacing it was supposed to be a triumphant coming together of the individual and free market principles. It actually ended up as one of the most glaring examples of market failure in postwar history. It wasn't like the other privatisations; its justification as anything other than an electoral bribe to its relatively well-off beneficiaries always rang false. It certainly did to Thatcher in the beginning. She was, she wrote, "wary of alienating the already hard-pressed families who had scrimped to buy a house on one of the new private estates at the market price … They would, I feared, strongly object to council house tenants who had made none of their sacrifices suddenly receiving what was in effect a large capital sum from the Government".

In the end, she came round, and made the policy her own. But the gap where the economic rationale for privatising council houses should be becomes a window through which it becomes possible to see beyond the individual privatisations to the meta-privatisation, and its one indisputable success: that it put more money into the hands of a small number of the very wealthiest people, at the expense of the elderly, the sick, the jobless and the working poor.

What do we think we know about taxes since the Thatcher revolution? Government spending has been cut, we know that. Income tax is lower than it used to be, we know that. And we might remember that the one time Thatcher tried to change the principle of progressive taxation, where the amount of tax you pay depends on your income, to a flat fee, where everyone pays the same – when the Conservatives tried to introduce the infamous "poll tax" on council services – it was the catalyst for her downfall. Low tax was her mantra. Her core political message was this, in her own words: "I believe the person who is prepared to work hardest should get the greatest rewards and keep them after tax. That we should back the workers and not the shirkers: that it is not only permissible but praiseworthy to want to benefit your own family by your own efforts."

What we think we know is wrong. Yes, government spending was cut, and it is being cut again, by Thatcher's coalition successors. When the Conservatives came to power in 1979 the top rate of tax was 83%, the basic rate 33. The top rate is now 45% and the basic rate 20%. The message seems clear enough. The Conservatives cut public spending and cut taxes, they kept their promises to working people, and Labour went along with it. But that is not all that happened. At the same time as they cut income tax and public spending, the first Thatcher administration hiked the sales tax, VAT – a flat-rate tax far more remorselessly regressive than the poll tax. When they came to power, the main VAT rate was 8%. It is now 20%. And the poorer you are, the harder VAT hits you. A study by the Office of National Statistics in 2010 showed that, for the richest fifth of the population, VAT added an extra 4 per cent to their tax bill. But the poorest fifth, often thought by the better off to pay no tax at all, actually pay 8.7 per cent of their income to the Treasury in VAT. When the Coalition came to power that year, its first chancellor George Osborne raised VAT by 14 per cent.

Where privatisation comes into this is that VAT isn't the only flat-rate tax on the poor. There are others, and they are onerous; they just aren't called taxes, though they should be – private taxes. One of the other ways the Thatcherites tried to balance the books in their first budgets was by hiking the price of gas, electricity and council rents, then all still under state control. After privatisation, above-inflation price rises have continued, in the private sector. A tax is generally thought of as something that only a government can levy, but this is a semantic distortion that favours the free market belief system. If a payment to an authority, public or private, is compulsory, it's a tax. We can't do without electricity; the electricity bill is an electricity tax. We can't do without water; the water bill is a water tax. Some people can get by without railways, and some can't; they pay the rail tax. Students pay the university tax. The meta-privatisation is the privatisation of the tax system itself; even, it could be said, the privatisation of us, the former citizens of Britain. By packaging British citizens up and selling them, sector by sector, to investors, the government makes it possible to keep traditional taxes low or even cut them. By moving from a system where public services are supported by progressive general taxation to a system where they are supported exclusively by the flat fees people pay to use them, they move from a system where the rich are obliged to help the poor to a system where the less well-off enable services that the rich get for what is, to them, a trifling sum. The commodity that makes water and power cables and airports valuable to an investor, foreign or otherwise, is the people who have no choice but to use them. We have no choice but to pay the price the toll-keepers charge. We are a human revenue stream; we are being made tenants in our own land, defined by the string of private fees we pay to exist here.

It is not racism that makes the foreign identity of some of the owners of our privatised infrastructure objectionable. It's the selling of taxation powers to foreign governments over whom we have even less democratic control than our own. It is the hypocrisy, in particular, of a party that claims to loathe nothing more than communism and totalitarianism obliging Londoners to pay a tithe to the Chinese government just for turning on the tap.