That said, many are voting with their feet - those reviled eastern states are havens for mobile youth, particularly those versed in technology.
I also don't think 30 years is the timescale. It's more like ten, given the already accelerating pace of growth in previously impoverished states. Do look at gdp per cap graphs for, say, Latvia. It's impressive. The financial crash hurt, but they're already back on a healthy sigmoid upramp.
https://www.google.co.uk/search?q=latvia+gdp+per+capita&rlz=...
In my low-middle class family there has been noticeable cases of factories or offices moving to Eastern Europe (Poland notably), and it is fueling extreme right wing parties, for good reasons.
You can talk about "mobile youth", but learning French when you're a low class Czech person is not something that's easy: the mobility in the EU is very restricted for that reason.