Another interesting angle to think about. The top 5% of income earners pay about 60% of the total income tax collected. While the bottom 50% of income earners pay only 2% of the income tax. If you want to start playing the class warfare game, seems to me a case could be made that the taxes should instead be raised on those making lower incomes.
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Since they control 95% of the wealth, 60% of the taxes appear awful small.