Let's see what one of the founders thought about taxing the wealthy:
As to the suggestion of double taxation, the answer is plain. The wants of the Union are to be supplied in one way or another; if to be done by the authority of the federal government, it will not be to be done by that of the State government. The quantity of taxes to be paid by the community must be the same in either case; with this advantage, if the provision is to be made by the Union that the capital resource of commercial imposts, which is the most convenient branch of revenue, can be prudently improved to a much greater extent under federal than under State regulation, and of course will render it less necessary to recur to more inconvenient methods; and with this further advantage, that as far as there may be any real difficulty in the exercise of the power of internal taxation, it will impose a disposition to greater care in the choice and arrangement of the means; and must naturally tend to make it a fixed point of policy in the national administration to go as far as may be practicable in making the luxury of the rich tributary to the public treasury, in order to diminish the necessity of those impositions which might create dissatisfaction in the poorer and most numerous classes of the society. Happy it is when the interest which the government has in the preservation of its own power, coincides with a proper distribution of the public burdens, and tends to guard the least wealthy part of the community from oppression!
The Avalon Project : Federalist No 36