The MMT Autopsy

In 2019, a congresswoman asked how the United States would pay for a Green New Deal, and an economist named Stephanie Kelton answered that the question was backwards. A country that issues its own currency, she said, does not need to find dollars before it spends them: it creates them by spending, then drains them by taxing. Households balance chequebooks; currency issuers do not. For a few months the idea was everywhere, dismissed by nearly everyone who had not read it and adopted by almost everyone under thirty who had. Most rebuttals attacked a version of the theory its authors never held. So let us do the harder thing first: state it at full strength, the way its best defenders do, before we lay it on the table.

Start with the claim that is simply, mechanically true. A government that issues its own free-floating fiat currency and borrows only in that currency cannot be forced into involuntary default; it can always create the currency to meet a payment falling due in that same currency. Argentina defaulted because it owed dollars it could not print; Britain and Japan and the United States owe pounds, yen and dollars they can. This is the definition of monetary sovereignty, not a loophole. MMT insists we take it seriously: the risk facing such a state is never running out of money in the way a household runs out. Whatever else you think, a sincere MMTer here is describing the settlement system correctly. Most of their critics quietly concede the point once pressed.

The second pillar is subtler and, again, largely sound. Why does anyone want intrinsically worthless state paper? Because the state accepts only its own token in settlement of the taxes, fines and fees it imposes. Taxes drive a baseline demand for the currency, a mechanism the chartalists traced back through Knapp. It follows that the operative constraint on public spending is not "where does the money come from" but real resources and inflation: spend past the economy's capacity to produce, and prices rise. From this, the job guarantee (the state offering a fixed-wage job to anyone who wants one) becomes an automatic buffer-stock stabiliser, expanding in slumps and shrinking in booms without a committee voting on it. Stated this way, MMT is a serious account of a fiat system. A fair adherent should read this far and nod.

Now the table. Begin with the origin story, because chartalism smuggles a history into its mechanics. Carl Menger showed in 1892 that money emerges from barter as the most saleable commodity, chosen by traders long before any sovereign stamps it, and the record agrees. Commodity monies, cross-border monies accepted where no single state's writ runs, and monetary continuity straight through the collapse of the issuing state all show money that predates and outlives its supposed creator. "The state creates money" holds as a claim about legal tender and tax-driven demand; it fails as a claim about what money is. The second joint is worse. "Inflation is the real constraint" sounds like rigour. It is a concession dressed as a limit, because inflation is precisely the constraint that binds first, hardest, and last.

Follow that through. No legislature in recorded history has throttled its own spending because a CPI print told it to; the political economy of MMT quietly assumes a chamber of philosopher-kings who tighten fiscal policy into a boom, which is not a parliament anyone has met. And the aggregates hide the injury. New money enters at a point (a contractor, a bondholder, a favoured programme) and those who receive it first buy at yesterday's prices while those who receive it last meet tomorrow's. Richard Cantillon described this distributional theft in the 1730s; MMT's talk of "the economy" as one balance sheet erases it. The empirical record of deliberately monetised deficits, from the assignats to the Reichsmark to Harare, is not ambiguous. MMT's description of reserve and settlement plumbing is largely correct, which is exactly what makes its prescriptions dangerous rather than merely wrong.