>Investment in one high educated person is at least 100 times more, than in a cleaning woman. This investment have to be returned.

We are talking about human lives. Cleaning woman has deserve a god life too.

>Fair is everybody to receive according his work. I don't like to return time(of communism) when I as young engineer received almost the same salary as low qualified worker.

It not about communism or capitalism. I have some friends/relatives Canada, Australia and Germany and than I know an engineer earns more from a low worker but not ten times.

Salary differences countries like Bulgaria and Turkey not a healty situation.