Bill Gates, Melinda Gates, and Warren Buffett are asking the
nation's billionaires to pledge to give at least half their net worth to
charity, in their lifetimes or at death. If their campaign succeeds, it
could change the face of philanthropy.
http://features.blogs.fortune.cnn.com/2010/06/16/gates-buffett-600-...

These are people who made thier wealths from their works of life, but yet they want to give all to charity. And corrupt Nigerian leaders: IBB, OBJ, e.t.c including Dangote were/are doing the contrary. Their actions were/are: oppressions, lootings, manipulations and stealings from the charity & public funds to enrich themselves. If only they all know they will all still face 6 feets just like the people they sent on the streets. Greedy dirty pigs!