Tyler Cowen explains the Germans’ reluctance to let government spend more to jump-start their economy. The answer: past failed experiences.

Certainly, in Germany, the recent history of fiscal stimulus wasn’t entirely positive. After reunification in 1990, the German government borrowed and spent huge amounts of money to finance reconstruction and to bring East German living standards up to West German levels. Millions of new consumers were added to the economy.
These policies did unify the country politically but were not overwhelmingly successful economically. An initial surge was followed by years of disappointing results for output and employment. Germany’s taxes remain high, and overall West German living standards failed to rise at the same rate as those of most other wealthy countries.