You misunderstand. The purpose of taxation is to take away the ill-gotten gains of the rich and redistribute them to the oppressed poor. Because, you see, all humans are equal, so if one is richer than another, he must have become rich by exploiting someone else.

Well, that's taxation in Marxism. And to an increasing extent, in the European Union. And no, I'm not making this up; the socialists (whether they call themselves The Left, Green or Social Democrats) explicitly state it in those terms.