I guess the real question that needs to be answered is what tax rate as a society are we comfortable with. I'm sitting at about 40% so not sure I feel great about that considering we are in massive debt with no end in sight and nobody that wants to tackle it.
The other issue is we have less than half of the country that make up the tax base. Almost 200 million people file no federal tax.
Income tax is not the only tax out there but it's the only actual progessive tax out there. So it makes wealthier people really angry because they expect all taxes to be regressive.
They don't like paying a tax that actually takes a real bite out of their income. Kind of like what poorer people do with every other tax that exists.