When you compare it to the income tax, that's not a big percent. The corporate tax is equivalent to an income tax on people, but with the strange property that

When you compare it to the income tax, that's not a big percent. The corporate tax is equivalent to an income tax on people, but with the strange property that it distributes the burden between the classes (shareholders vs employees, though there is a lot overlap) through the market instead of by law. Depending on the situation in a particular firm, the burden might be wholly on employees or wholly on shareholders, but probably somewhere in-between. This is all ignoring that some of the burden could be shifted to consumers too, depending on how competitive the market is and what the margins are. As I said, you would raise the income tax on the middle to high brackets to offset abolishing the corporate tax. You'd be taxing the same people, for the same money, with much less hassle for everyone. What does the corporate tax accomplish that an equivalently higher income tax does not? It's the same money.