All of the economic, legal, fiscal, political aspects of life are what we elect representatives to deal with. Asking an ordinary Joe, like me, to decide how things should be done is crazy. Knowledge and expertise built up over decades is a must.
As I understand it, (and I could be wrong, ) it is an aim of the EU to eventually eradicate the kind of disparity which causes people to seek work outwith their own country. Harmonisation, if you will.