Ben Bernanke, chairman of the Federal Reserve Bank, has a lot more tools for supporting U.S. economic activity through expansionary monetary policy than he discussed in his Jackson Hole speech, which alluded only to more quantitative easing and credit easing—increasing the size and changing the liquidity composition of the Fed's balance sheet.

Perhaps out of fear of resurrecting the moniker "Helicopter Ben," Mr. Bernanke did not refer to the combined fiscal-monetary stimulus that (almost) always works: a fiat money-financed...