Moreover, if workers and their families are less fearful of change, political pressure in favor of trade barriers or other measures that would reduce the flexibility and dynamism of the U.S. economy would be reduced (Kull, 2004).
There is probably an element of truth in both of these answers. The shock caused by the financial crisis was indeed a very large one and a very large monetary response was appropriate and helpful. At the same time, though, the transmission of the monetary stimulus does look to have been a little different through this episode.