Since the Federal Government gets 18% of our money including all taxes, Excises social security,etc. Why not just charge everyone 18%. The rich, the poor, gunners,anti-gunners, smokers nonsmokers,drivers and users of mass transit. All unified in paying 18% of our income. Further the corporate income tax would be 18%, and so we do not double tax the money let corporations deduct dividends from their profits calculation.
Then the focus would not be who is paying fair or unfair, because we all pay the same. The focus should then be "Why are we paying so much?" and why does the Government need it?