Thomas Palley and the Case MMT Doesn't Answer

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Thomas Palley, an economist working in the Post-Keynesian tradition MMT itself often claims kinship with, published one of the more detailed academic critiques of Modern Monetary Theory in 2015, and his objection is not the standard mainstream complaint that deficits are simply always dangerous. Palley's argument is narrower and, for that reason, harder to dismiss as ideological: he contends that MMT's account of how fiscal and monetary policy interact is cleaner in theory than it can be in practice. Financing government spending through central bank money creation, he argues, does not leave interest rates and bond markets as neutral bystanders the way MMT's presentation sometimes suggests; investors price in expectations about future inflation and currency stability, and a government relying on the claim that it faces no solvency constraint may find borrowing costs and exchange-rate pressure responding well before any inflation target is breached. He also questions whether the fiscal restraint MMT prescribes as the actual inflation check, cutting spending or raising taxes once inflation appears, is politically achievable with the speed and precision the theory requires. The critique does not deny that a sovereign currency issuer differs meaningfully from a currency-using household; it argues the gap between the two is smaller, and harder to manage in real time, than MMT's proponents present it.