This is the typical interventionists’ ploy. The problem is never the intervention; it’s that we are not doing enough of it. The first two rounds of QE and Operation Twist were successful in raising stock and commodity prices temporarily. Those actions even brought some consumption forward to pad present GDP numbers, but one thing it did not do was permanently raise growth.
Firms and consumers simply do not wish to engage in additional investment and consumption, and there is no indication that interest rates a little closer to zero are going to prod demand. Additionally, these low rates are distorting financial markets creating a huge bubble in the fixed income market and another equity market bubble.
Keep printing. Nothing bad will happen.