The G20 has appealed for the use of other policies, notably fiscal and structural reforms. While other policies would certainly be welcome, one can have justified doubts about their implementation. For a start, active stabilising fiscal policy is restricted by law in the EU and by politics in the US.
As regards the economy of the United States, there has been extensive debate on the question of whether the United States has entered an era of a “New Economy”. Growth would be sustainably higher than in the past, inflation would be a thing of the past, while economic fluctuations would be much more limited than formerly.