Actually, his family brought a lot of money to the USA - they were rich before they got here. He, and people like him, are just as much "hard working ... taxpayers" as anybody else, and I don't think it is appropriate to suggest that successful entrepreneurs owe something, beyond paying the taxes required by law, to the government. Suggesting that somehow Mr. Saverin owes more because he and his colleagues made a hugely successful business by their own efforts sounds like one of Elizabeth (Fauxchonhontas) Warren's ideas.
Saverin probably paid more in income taxes as a student at Harvard than many American citizens will pay in their entire lives. And 15% of his present multi-billion dollar Facebook portfolio could be a payment to the government of over $100 million dollars. He should be getting a personal thank you note from the Secretary of the Treasury, not scorn from politicians who have lived off the taxpayers for their entire careers.
From Wikipedia:
Saverin attended Gulliver Preparatory School in Miami, and went on to Harvard University, where he was a member of the Phoenix S.K. Club as well as president of the Harvard Investment Association. While an undergraduate at Harvard, Saverin took advantage of Brazil's lax insider trading regulations and made $300,000 via strategic investments in the oil industry.
RE: While an undergraduate at Harvard, Saverin took advantage of Brazil’s lax insider trading regulations and made $300,000 via strategic investments in the oil industry.
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So, is that a crime either in Brazil or the USA?