Which Wall Street CEOs should walk the plank?

So far, the U.S. has committed $12.8 trillion to bailing out Wall Street. Does this mean that Wall Street CEOs made mistakes? Apparently not. Because if it did, the Wall Streeters who cost taxpayers all that loot would be out of their jobs.

A few have moved on -- consider Merrill Lynch's former CEO Stan O'Neal, who, after leaving the investment bank with a then-record $2.24 billion loss, received a "kick in the rear" amounting to a $161 million retirement package. (O'Neal is just one of the Harvard MBAs whose destruction of the global economy is prompting some navel gazing at HBS.)

Most, though, are still at their desks, gamely calling the shots. Yesterday, Treasury Secretary Tim Geithner suggested it could be time for that to change.