And regardless, you'd be paying taxes to a planetary government that you had no say in.
1) What makes you think you'd have no say in it? You would presumably have representation in the government.
2) There is no money in the future, so no taxes.
"Canon is only important to certain people because they have to cling to their knowledge of the minutiae. Open your mind! Be a Star Trek fan and open your mind and say, 'Where does Star Trek want to take me now'." - Leonard Nimoy