Forty years of an economic experiment that failed on its own terms, and the reason it keeps winning anyway
Start with the part nobody disputes, because it was said out loud, in public, by people who wanted credit for it.
By 1988, Margaret Thatcher had cut Britain's top rate of income tax from 83 percent to 40 percent. Ronald Reagan ran a parallel program across the Atlantic. Neither of them hid the reasoning. The argument was that money concentrated at the top does not sit there. It moves. Freed from taxation, the wealthy hire, invest, expand, and the benefit works its way down to everyone else.
This was not a vibe. It was a prediction, with a mechanism attached, and predictions with mechanisms can be checked.
So let us check it.
What actually happened
In Britain, the Gini coefficient, the standard measure of income inequality where zero is perfect equality and one is perfect concentration, stood at 0.25 in 1979. By 1990 it had climbed to 0.34. Over the same period the top ten percent of earners raised their share of national income from 21.1 percent to 25.1 percent, while the bottom ten percent's share fell. By the end of the decade the wealthiest one percent of households held roughly 21 percent of all household wealth.
The United States ran the same experiment and got the same result. Median real wages fell by 0.6 percent while the Gini coefficient rose from 0.37 to 0.43.
Those are the numbers from the decade itself. The longer view is worse. Between 1989 and 2019, typical American working families saw negligible increases in real, inflation-adjusted income and wealth. Over that same thirty years, the wealthiest one percent of Americans became roughly twenty-nine trillion dollars richer.
Thirty years. Negligible for most people. Twenty-nine trillion for the top.
If the mechanism worked, that is not what the data would look like.
The objection, and why it does not save the theory
There is a serious defence available here, and it deserves to be stated properly rather than waved at.
Not all of the wage stagnation belongs to Reagan and Thatcher. The 1970s delivered oil shocks and stagflation, and much of the damage was already in motion before either of them took office. Automation was coming regardless. So was competition from Asian manufacturing, which would have hit industrial wages in Sheffield and Detroit no matter who held power. Anyone who tells you the entire divergence traces to a single set of tax bills is selling something.
The genuine dispute among economists is not whether the damage happened. It is how much of it was a policy choice and how much was a trend arriving anyway.
That is a real argument. It is also not a defence of the theory, and here is why.
The claim was never "we will slow the decline." The claim was that cutting taxes on capital would generate broad prosperity. Even granting every external headwind, the promised upside never showed up anywhere, in any of these countries, in any decade.
And we can test that directly, because someone did.
Researchers at the London School of Economics and King's College London examined major tax cuts for the rich across five decades in eighteen wealthy countries. Eighteen national experiments, fifty years of data, a range of political systems and economic conditions. Their finding: the cuts reliably increased the incomes of the rich, and produced no meaningful effect on growth or unemployment.
That is not one bad implementation. That is not Liz Truss picking the wrong week. That is the same result, everywhere it has been tried, for half a century.
Then there is the inversion, which is the part that should end the conversation. A 2015 International Monetary Fund study found that raising the income share of the top twenty percent is associated with lower GDP growth, while gains at the middle and bottom are associated with stronger growth.
The theory is not merely unproven. In the aggregate data it runs backwards. Money at the top is the least productive place to put it, because people at the top do not spend it into the economy. They park it in assets, which inflates the price of assets, which is a different thing entirely from prosperity and gets counted as prosperity anyway.
This is not an American story
It would be convenient for Canadians to file this under things that happen elsewhere. It is not available to us.
Statistics Canada reported that the income gap, measured as the difference in the share of disposable income between the top forty percent of households and the bottom forty percent, reached 46.7 percentage points in 2025, up from 46.4 the year before. It widened because lower-income households saw wages rise more slowly than the national average while the wealthy benefited from strong financial markets.
The wealth picture is starker. At the end of 2025, the top twenty percent of the wealth distribution held 65.7 percent of Canada's total net worth, averaging $3.5 million per household. The bottom forty percent held three percent, averaging $81,650.
Oxfam Canada puts it in the sharpest available terms. The richest one percent, meaning those with a net worth of seven million dollars and above, hold close to $3.9 trillion. That is nearly as much as the bottom eighty percent of the country combined.
Four in five Canadians, on one side. Roughly one in a hundred, on the other. Approximately even.
So why does it keep winning?
Here is the question that actually matters, and the one most coverage skips right past.
If this program has failed on its own stated terms for forty years across every country that has tried it, why is it still standing? Why is it not merely surviving but governing, in most Canadian provinces, in Britain for most of a generation, in the United States right now?
The answer is that it has never had to run on its results.
Consider the arithmetic honestly. An economic program that moves wealth upward has, by construction, a very small natural constituency. You cannot assemble an electoral majority out of people who benefit from capital gains treatment. There are not enough of them. So the program requires a mass base that it does not economically serve, and it has to get that base from somewhere.
Culture war is where it gets them.
This is not a conspiracy and it does not require one. It is simply the cheapest available product. Attacking a minority population costs a donor class precisely nothing. A school board policy restricting what a teacher may say to a frightened kid costs a billionaire zero dollars. A ban costs zero dollars. A moral panic about libraries, or pronouns, or a swimmer, or a bathroom, costs zero dollars. These are wins that can be delivered on schedule, celebrated loudly, and repeated indefinitely, and not one of them requires anybody wealthy to give up anything at all.
A wealth tax costs something. A minimum wage costs something. Enforcing corporate tax collection costs something.
So the offer stabilises into a trade. You will not get the wage. You will not get the house. You will not get the pension your parents had. What you will get is someone to blame, delivered reliably, forever.
And every year the economic promise fails to arrive, the cultural bill has to be paid louder to cover the silence. That is why the targets escalate rather than resolve. A grievance that got resolved would stop working.
The minority population is not collateral damage in this arrangement. It is the product being sold.
The trade may be breaking
Something has shifted recently, and it is worth reading carefully rather than triumphantly.
The Brookings Institution's analysis of the 2026 Democratic primaries in the United States found that they were not, in the main, a left-versus-centre story at all. The frame was insurgent versus establishment, outsider versus insider, populist versus elitist. The winning candidates were defined less by ideological radicalism than by working-class populism.
The results are hard to argue with. In Maine, Graham Platner beat a sitting two-term governor by more than fifty percentage points. Progressive union leaders took nominations in swing districts in Pennsylvania, Ohio, and Montana. In California's Central Valley, one of the most competitive House districts in the country, a thirty-one-year-old former Medicaid recipient defeated a moderate legislator the national party had personally recruited and financed. In New Jersey, Analilia Mejia won a special election in an affluent suburban district on an explicitly populist platform.
Note what these candidates have in common, because it is not what the usual coverage says. It is not that they are further left on social questions. It is that they named a villain, and the villain was economic.
That is the whole variable.
For forty years, one side has been naming villains and the other side has been explaining process. "We are convening a working group" does not compete with "they did this to you." It never has. The right did not win the argument on economics. It won because it was the only party in the room offering an explanation for why your life got harder, and it pointed at your neighbour.
What the 2026 primaries suggest is that when someone finally points at the actual cause, voters go there instead. Including voters in wealthy suburbs. Including voters who went the other way in 2024.
The local version
British Columbia is running a compressed version of this in real time.
The BC Conservatives won 44 seats in 2024 and came within three ridings of forming government. Since then, twelve legislators have left the caucus.
They are not leaving over taxation. Nobody has walked out over fiscal policy. Rosalyn Bird, a former caucus whip, left issuing warnings about divisive leadership, racism and homophobia, adding that freedom of speech does not relieve anyone of responsibility for what they choose to say. Teresa Wat left after the leader reportedly questioned her allegiance to Canada in a group chat and declined to apologise. Ian Paton and Brennan Day are gone too.
These are not progressives. They are conservatives, and they are leaving because of what the coalition has become. That is the fault line described above, cracking in public, at provincial scale, on a timeline you can watch.
The part that should worry you
Here is where a more comfortable essay would end. The trade is breaking, economic populism is ascendant, the arc bends, and so on.
I do not think that is true, and I think saying it would be a disservice.
Naming a villain is a technique. It is not a politics. It belongs to nobody, it carries no moral content of its own, and it works for whoever picks it up first and says it loudest. The right got there forty years ahead and aimed it at people who could not fight back, because those targets were cheap and available and required no sacrifice from anyone who funds campaigns. That was a choice, not a law of nature.
The left rediscovering the technique in 2026 does not guarantee anything. It is a demonstration that the technique still works, which was never in doubt. Nothing in the mechanism ensures that the economic villain beats the cultural one. That gets decided campaign by campaign, riding by riding, argument by argument, and it gets decided in favour of whoever is more willing to be specific about who did this.
Which means the actual danger is not that this economic program wins another election. It is that it loses the economic argument completely and keeps power anyway, because the cultural product still sells and nothing else is on offer.
We have forty years of evidence that the promise does not arrive. We have eighteen countries and five decades of research confirming it. We have our own national statistics saying one percent of Canadians hold nearly as much as the bottom eighty combined.
None of that has been sufficient so far. Data has never beaten a story.
The only thing that has ever beaten a story is a better one, told about the people who are actually responsible.
Sources: Statistics Canada, Distributions of household economic accounts, Q4 2025. Oxfam Canada, Canada's Wealth Inequality Report. Hope and Limberg, London School of Economics and King's College London, on tax cuts for the rich across 18 countries. International Monetary Fund, 2015, on income shares and growth. Brookings Institution, on the 2026 Democratic primaries. CTV News, on BC Conservative caucus departures.
