That's absolutely not how any of this works.
If they can get top talent for half the salary they won't suddenly start paying more.
There is only one solution: EU governments heavily subsidize those European cloud providers which enables them to offer top salaries and therefore attract top talent.
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It would also help not taxing those incomes at 60%.
Every time I look at a permanent role in Europe, if I didn't already close the tab based on the offered salary, I plug the number into a take-home calculator and then I close the tab for sure.