George Soros is another example of tax arbitrage. He has benefited from running his hedge fund in offshore jurisdictions while maintaining research offices in NYC.
Similar to MSFT - "we just research in NY, the money manages itself from overseas accounts."
I'd guess there's something in dodd-frank about ending these loopholes.
With soros, it's particularly egregious because he uses his excess wealth to argue for big government policies in the US.
If Obama wants tax increases - how about retroactive taxes?