If people think they are better off economically as a region they will leave. This might look like a economic problem, but its actually a political problem. It literally deals with the fact that who gets to collect and keep taxes, and later plan how to spend that money.

>>Education not controlled by politicians is dangerous to authoritarian regimes.

Its always a mistake to assume that people don't know if conditions elsewhere are better, or there own conditions are worse.

Just because people put up with bad governments, it doesn't mean they will not rebel later. Really it all depends on the situation, and time.