Ooops. xo
Anyhow.
Flat taxes are inherently unfair, because when you are poor, most of your money goes to survival - sales taxes and stuff affect that, so that rich people pay too little. The rich are also those who benefit MOST from a nation'ss protection - therefore they should support it more. A person may live in an anarchy, but a multinational corporation with no protection from a nation has difficulties with its assets, cause everyone's looting away.
Tax brackets are kinky, but you could implement a progressive system where the amount of taxes is a function, a mathematical formula, rather than a step-by-step classification system.
