U.S. Customs. Why do I never pay customs?

Jantje:
(I take home around 1/3 of what my employer pays for me)

66.7% tax rate? Seriously? So, if you are paid, just an example, 50,000 euros per year you would take about 17,000 euros home and taxes would take 33,000 (rounded it to the thousands)? How can you afford rent or a home unless you are making 120,000 euros a year or more, which I would think would be quite rare.