Too Big to Fail and the Economic Crisis

Neil Irwin seems to miss the major issues on too big to fail in his discussion of Treasury Secretary Jack Lew's remarks proclaiming too big to fail (TBTF) to be sort of over. The most obvious issue is simply whether the markets believe TBTF is over.

This is a question of whether they think Jack Lew or his successors will simply wave good bye if J.P. Morgan, Goldman Sachs, or one of the other megabanks goes under. If they don't believe that the government will just let one of these banks sink...