Why do we talk about “helicopter money”? We talk about helicopter money because we seek a tool for managing aggregate demand–for nudging the level of spending in an economy up to but not above the economy’s current sustainable productive potential–that is all of:

1. Effective and successful–even in the very low interest rate world we appear to be in.

2. Does not excite fears of an outsized central bank balance sheet–with its vague but truly-feared risks.

3. Does not excite fears of an outsized government interest-bearing debt–with its very real and costly amortization burdens should interest rates rise.

4. Keeps what ought to be a technocratic problem of public administration out of the mishegas that is modern partisan politics.

Right now the modal projection by participants in the Federal Reserve’s Open Market Committee meetings is that the U.S. Treasury Bill rate will top out at 3% this business cycle. It would be a brave meeting participant who would be confident that we would get there–if we would get there–with high probability before 2020. That does not provide enough room for the Federal Reserve to loosen policy by even the average amount of loosening seen in post-World War II recessions. Odds are standard open market operation-based interest rate tools will not be able to do the macroeconomic policy stabilization job when the next adverse shock hits the economy.

The last decade has taught us that quantitative easing on a scale large enough to rapidly return economies to full employment is one bridge if not more too far for central banks as they are currently constituted–if, that is, it is possible at all. The last decade has taught us that bond-funded expansionary fiscal policy on a scale large enough to rapidly return economies to full employment is at least several bridges too far for our political systems, at least as they are currently constituted.