Many of the eastern european captains on the left seat for many years see that money, maybe.
Many other are well short of that amount, and a lot of them will never see it at all.
The only case you dont have double taxation is by moving family and everything to your base country.
Or just stick your head under the sand, hoping that the tax man will never come knocking, which is what most people do in Wizzair, and brag about their salaries