Not to get too political on HN, but the top 10% of earners in the United States already pay ~45% of the taxes, which is a greater share of the burden than anywhere else in the industrialized world. In Germany, for example, the top 10% of earners pay 31% of taxes. In France, they pay 28%, and in Switzerland, only 21%.

If the United States wants to have a European level of both social services and spending (a legitimate choice, although not one I'd make), the wealthy can't possibly carry the tax burden alone - it needs to be spread around more equitably, over all tax brackets.