The sad thing is that Eastern European have almost as low reproduction rate as the West. So the young, energetic people leave and old or sick people are left. This spells demographic disaster.
Having more children and having jobs for your own countrymen is necessary for long term survival.
This is exactly what will happen. All that will be left is a empty steppe. In eastern Germany (where all able youngsters left for western Germany) you already can observe the outcome.
Since I doubt that the reproduction rate can be raised (it is falling everywhere - even in the US) due to the new role that females found because of emancipation, politics have to deal with some fundamental problems in the near future.