You need to enforce monopoly laws, and more important than individual tax rates, you need to get the tax base spread out correctly again.

1950: 25% tax revenue came from personal income. 25% from social security. 25% from businesses. 25% from excise taxes.

Today: 50% tax revenue from personal income. 35% from social security. 7% from business. 7% from excise taxes.

This problem is never understood.