Perhaps you've already seen Warren Buffett's brilliant opinion piece in the New York Times called Stop Coddling the Super Rich. If not, it's worth a read (he asks for higher taxes on the rich - especially those who "earn" their money through investing alone!).
Warren Buffett is one of the super rich who has pledged to give away a substantial portion of his wealth to charity, like the Bill and Melinda Gates Foundation, rather than pass all of it to his heirs. He's seen what happens to children that inherit all their wealth, and knows it's better for the poor and his heirs if his wealth passes to those who truly need help. Well done Mr. Buffett!
CREDO Action has released a petition asking the Senate to act on Warren Buffett's request for higher taxes on the rich. I signed it.