Switzerland ain't cheap, and it's not in the EU. It looks like the rich Germans have had enough of Angela and her open doors.
Data from 2015.
Switzerland is the obvious one, they have a second country set up there practically. Data lucks suspect like turkey in 5th, they are unlikely to be native germans i would have thought if going there, turks being the biggest minority group in germany, but the rest sounds plausible, but who knows.