Yes it is, or at least it used to be. The more you make, the more you pay. That's why billionaires don't "make" any income, and bury the accumulation of their wealth through other means. Neither Amazon, nor Jeff Bezos pays any income tax and it's all legal. Do you think that's right????
Why do you think that Bezos and Musk are the first Trillionaires in the world? They haven't had to pay any taxes in years. They are using the educated work force created by American taxpayers, and the communication and transportation systems paid for by American taxpayers, to build and sell their products, and ship them to consumers, but they don't contribute to the education, infrastructure, or governmental services they need to make that money.