I liken him to a mafia boss, donating money to charity after having amassed a fortune extorting and threatening people: can the money still be considered an honest donation or a PR effort to make ensure that the mafia boss is remembered in better terms than "antisocial criminal"?
Sorry, Bill. You may be far richer than I'll ever be, but my money is made honestly. I wasn't born rich, haven't built my whole empire on other people's work (QDOS was bought, Windows comes from OS/2, etc) and I haven't been found guilt of a crime by the DOJ.
Also: sorry people dying of diseases, that I can help y'all by being rich enough to buy small islands. The little, honest man is such a powerless pawn in today's money-centric society.