Romania is much poorer than Norway, but the tax is the same - it's a flat tax rate. Play with the calculator and you'll see. The numbers are in RON - which is 5 times smaller than the dollar, and the value is implied to be monthly - but it makes no difference because of the flat rate.

In other countries you might have tax brackets, but I know from experience that it's very easy to reach 45% total tax rate (not marginal).

e.g. try Belgium, at 100k the state gets 50% https://www.belgiumtaxcalculator.com/?salary=100000&average=...

Try UK. At 50k you pay "only" 26%, but then in the US you pay almost nothing, if you have a family with kids and use the deductions smartly.