> I think it's also worth noting that the US already gets 70% of all its taxes from the top 10%

Yes, but they also own 70% of all the wealth[1], according to 2007 numbers (the percentage is almost certainly a little higher today), so that's perfectly proportional. If you own 70% of the wealth, you should pay 70% of the taxes.

http://www.businessinsider.com/15-charts-about-wealth-and-in...