In a high-tax US state like California the top marginal income tax is about 47%. This covers no health care unless you are over 65, disabled, or are below the medicaid threshold, which is low.

There is also a lower rate om capital gains such as stock or real estate, sales (like a VAT), gas tax, vehicle tax, utility tax, phone tax, cable internet tax, etc.

Plus, of course, employers are paying some extra payroll taxes per employee.