Government spending accounts for about 20% of GDP in a given year, so curtailing government spending will detract from GDP growth, other things being equal. This is one reason why financial markets are nervous—much of the developed world is experiencing at best modest economic growth.
And yet, the U.S. and many European countries are launching into spending cuts and austerity programs aimed at reining in their debts. While this is desirable from the point of view of long-term economic health, austerity measures that curtail government spending will, by definition, detract from short-term GDP growth. Investors worry that this hit to growth is occurring at a time when the global economy is already weak and could tip us back into recession.
Indeed, University of California Berkeley economist Christina Romer, who was the Chair of the Council of Economic Advisors and a co-author of the Obama stimulus plan, once famously listed six lessons of the Great Depression for policymakers. One of these was “Beware cutting back stimulus too soon.” It is this dictum that the markets fear the government is violating with its newfound focus on austerity measures and fiscal discipline.
Federal Reserve Chairman Ben Bernanke, an expert on the Great Depression, once promised that the central bank would never repeat its 1937 mistake of rushing to tighten monetary policy too soon and prolonging an economic slump.
"Regarding the Great Depression. You're right, we did it. We're very sorry. But thanks to you, we won't do it again," Bernanke said back in 2002 at a conference honoring legendary economist Milton Friedman's 90th birthday.
He has been true to his word, keeping interest rates near zero since late 2008, but cuting government spending may end up having a 1937-type chilling effect on the economy, and there is little Bernanke can do to counter that.