How do we avoid a liquidity trap? Fiscal expansion.
How do we avoid another credit crisis? Increase the savings rate (among other things.)
Obviously these are incompatible in the short term. And restructuring to raise the savings rate, public or private, will certainly trigger a recession. But it doesn't seem wise to trigger one when we already have one going on from the credit crisis. This is basic countercyclical stuff.
This all assumes the question we want to answer is "how do we help capitalism be the best capitalism it can be?," of course...