I've heard this suggested before: abolish all corporate tax and increase capital gains tax to equal income tax. This will level the playing field between large and small businesses, since the former has the means to dodge byzantine corporate tax laws. It will also give an incentive for companies to stay onshore. Any downsides?
Corporate tax does not make sense because "income" and "profit" for a company are very loosely defined. Instead, a simple GST on products and services should be enough. Unambiguous and easy to reason about, with very less maneuverability to avoid. In fact, I would rather income tax for individuals also be done away with. Just tax every transaction in the market. That is much fairer and presents less avenues to avoid…
Yes, the verbiage used by the IRS is awful; they use the term "income tax" to describe both the "personal revenue tax" and the "corporate profit tax".
Unfortunately they're stuck with it because the 16th amendment uses (but does not define) the term "income".
So if they call the thing that they're taxing anything other than "income", they have to deal with a bunch of clowns arguing that they aren't allowed to tax that.