I can't speak for the rest of the countries in the region, but in Romania if you work in IT for a decent company you pay 0 income tax if you graduated from a local CS department and only a 10% flat rate otherwise.

A senior position at a good company in Bucharest will mean at least 3000 Euros net per month which means that you'll live like a king, since rent for a great apartment will be something like 500-600 Euros.

The downside is lower development you notice regarding infrastructure, education levels, pollution, etc.