Our new report reveals that billionaire philanthropy is falling short -- because even when they pledge to give away their wealth, billionaires keep getting richer. We can't rely on billionaires to give away their money. The rich need to pay what they owe, and a fair tax system would prevent these absurd fortunes from accumulating in the first place. Add your name in favor of a wealth tax. (And read more in the Inequality.org / Institute for Policy Studies report, The Giving Pledge at 15).