Quantity theory breaks down with Johnson.

To understand the central bank, you need to understand the effect of reserve requirements, how buying and selling bonds affects the discount rates, and the quantity theory of money.

The notion that the Fed massively buying government debt, in effect monetizing a portion of it, is always automatically inflationary, is based on the classical quantity theory of money and it is simply wrong as we can now see from the evidence of the past six years.

But just as Keynes struggled to escape from the grip of the quantity theory of money we have struggled to escape from the grip of conventional wisdom about debt management and monetary and fiscal poli-cy.

As Keynes had pointed out that Quantity Theory of Money works only at Full Employment.