I don't mind ex-Wall Street bankers entering the public sector as a second career.  But presumably they have sold their old company's stock and don't have any direct monetary ties to the banks any longer.  And if retired people like Alan Greenspan want to get rich on the speaking tour, be my guest.

But this Bloomberg article is very frightening.  People who are actively shaping policy, such as Gene Sperling and Lee Sachs, should not be getting any money from Wall Street, even if it's just for speeches.

http://www.bloomberg.com/apps/news?pid=20601087&sid=abo3Zo0ifzJg