They argue that economies grow because banks lend and consumers spend. But a "liquidity trap," they argue, convinces consumers not to consume and businesses not to borrow. The resulting combination of slack demand and falling prices creates a pernicious cycle that cannot be overcome by the ordinary forces that create growth, like savings or investment. They say that a liquidity trap can even resist the extraordinary force of monetary stimulus by rendering cash injections into useless "string pushing." Some of these economists suggest that its power can only be countered by a world war or other fortunately timed event that leads to otherwise politically unattainable levels of government spending.

Putting aside the dubious proposition that the human desire to strive and succeed can be permanently short-circuited by an economic contraction, and that modest expected price declines can quell our desire to consume, the Keynesians have overlooked a much more dangerous and demonstrable pitfall of their own creation: something that I call "The Stimulus Trap."