This top Silicon Valley investor thinks his taxes are too low so he's doing something about it

Sam Altman, the president of top startup mentorship and investment program Y Combinator, thinks venture capitalists like himself have gotten off too easily, tax-wise -- so he's putting the difference into improving the world. "I donate up to the tax amount I think I should pay," Altman told BuzzFeed News' Nitasha Tiku. The fiscal issue Altman is rebelling against is the "carried interest" tax for hedge fund managers and VCs. It's one of Wall Street's favorite loopholes, and one that President Barack Obama has long railed against. Basically, it allows these fund managers to take the incentive portion of their fees -- which they earn based on the gain in value of the investments they made for clients -- and classify that income as capital gains rather than ordinary income, thereby paying a much lower tax rate.