That is also why the taxes are 52%. They have to nail everyone else who does work full time and earns a decent wage.
(Edit for completeness : effectively the tax brackets end up as 33, 41, 42, 52).
Or in other words, taxes are relatively high because it is a welfare state.
The Netherlands' are high, but not higher than other northern-European countries.
"The Netherlands' are high" does not suggest that "The Netherlands" is plural; only that its taxes are.
You can argue about the services you get, but comparing directly taxes without taking into account the services provided in return is disingenuous.