Then they would need to tax nonprofit religious organizations too.
Why don't they just make the special interests pay their own multi-trillion dollar war bills instead of sabotaging US universities with surprise taxes?
If you increase expenses and cut revenue, what should you expect for your companies?
Why not just make a flat tax for everyone and end all the special interest pandering and exceptions for the rich. It is a poisonous misapplication of the time of our government to constantly be fiddling with tax code to favor one group or another.
Because a lot of people, including many economists, believe capital accumulating endlessly to the same class of thousand-ish people is bad. A flat income tax exacerbates wealth inequality considerably.