As the global financial crisis entered its most dramatic phase, in the second half of 2008, the International Monetary Fund (IMF), many governments and several distinguished scholars advocated expansionary fiscal olicy as the second most effective tool (after monetary stimulus) to fight deep recession and deflation. Now, more than a year later, the previous excitement surrounding the supposed power of fiscal stimulus largely disappeared and instead has been replaced by ising concerns over the sustainability of public finances in many countries. Unfortunately, the previous enthusiasts of the active counter‐cyclical fiscal policy have not always realized the causality between the two.