I haven't seen anything about this on Mudcat so far, but I heard a discussion on NPR that a number of America's (and the world's?) richest people--Bill Gates, Soros, Oprah, and Buffet, that I remember being mentioned--had a meeting and announced a joint intention/recommendation/urging that people in their super-rich league should GIVE AWAY a half of their net worth, either currently or at death. Seems to me there was mention of one or two other super-rich people from other countries were part of the meeting and announcement, too.

Dave Oesterreich