Adding a cap to the current system would improve efficiency (there would be no disincentive to earn income beyond a certain level), while maintaining the natural safeguards against confiscatory government that are built into the income tax.
The income tax has built-in safeguards against the government taking too much.
There are no safeguards against government overreaching with income taxes.
A girl is sitting down in a tub full of water.
Two men are running to the bar.
A man is eating pizza
A female in a body of water.
The men are incredibly rich.
A girl is outside.