Go and explain that to a Romanian or a Latvian. Not so long ago, their citizens were prepared to give up everything to leave these countries. That is no longer the case. You're deluding yourself.
As a Romanian, I find this comment funny. To think that Romania improved because of the EU, not because we got rid of communism in 1989 followed by a period of wild west capitalism years before even entering EU. Most EU money in here are wasted on corruption with infrastructure projects.