story
Most European countries have heavy tax but very protective social services, including free education and universal healthcare, which only works because there's an expectation that when you come of age, you'll support the same system . So every citizen before turning adult (or paying taxes) are a net-debtor for society as a whole. Knowledge worker expats start at zero debt for you.
Worst thing for countries like this is if its citizen get educated there and the best talent just moves to greener pasture (SV etc).
If one can let go of their jealousy and see things practically, some tax incentive makes sense, but should be done smartly (not to cover rich people buying their way in while contributing zero long-term)