Businesses are accumulating large amounts of cash and not investing because their balance sheets are in bad shape as a result of the decline in the value of their assets—many of which are the flip side of the same bad mortgages that are hurting consumers. And governments are reducing their spending under the pressure of austerity programs.
But no inflation has resulted as the cash sits idle in corporate coffers. Even at zero interest rates, business firms are reluctant to spend!
Much better is the Keynesian insight that this is the perfect time for fiscal policy. In the U.S. again, there are immediate needs to repair roads and bridges, rebuild the energy grid, and modernize other means of travel. Keynesian fiscal policy expansion will benefit the economy in both the short and long run.