IMO this is half-measures. You wanna a strong EU? Merge the salaries and living standards from the north the south and west to east. Germans workers shouldn't blackmailed by auto-motive companies leaving for Poland unless they accept smaller salaries and vice-versa polish workers shouldn't emigrate to Germany to find a decent salary, pension, etc.

Flat out these social differences and you'll have the social support you need to fight and/or collaborate as equal with everyone else. It's very simple.

ps. I'm not saying everybody should stay "put". But ppl shouldn't be migrating within the EU for these reasons. That was the initial goal anyway, then they started celebrating things that no one in the EU cares about as if it's something that matters (i.e. Apple vs EU dispute over the charger...)