Federal taxes plus state taxes plus property taxes (if you own any) plus vehicle taxes (usually in the form of plates and fuel taxes) plus sales taxes (on anything you buy) plus who-knows-what all else.

It adds up to a good chunk of the average working person’s paycheck.

Edit: Forgot to add county and local taxes. For example, Cook county Illinois adds substantial sales taxes and gas taxes on top of state sales and and federal gas taxes.