most the legal immigrants here are engineers, doctors, professors, etc... Most of the legal immigrants in Sweden are refugees from war torn countries (I know this, I was one of them) Somalia, Yugoslavia, Nigeria, Turkey, Albania, Columbia, etc... in the 90s. I'm guessing its the same idea but different countries now.  

Even the illegals here mostly come for the opportunity to earn money to send home, which is very admirable. 

The birth rates minus immigration are negative in both countries (believe me there are socialist problems in the US too, look at Bernie's Vermont, comes in last in growth), so the fact that they shlep in immigrants to boost numbers does not mean much. 

Re education, they still earn less, would rather earn 100K with no college than 50K with college. Plenty of debt still there: https://qz.com/85017/college-in-sweden-is-free-but-students-still-have-a-ton-of-debt-how-can-that-be/