Some countries like Germany (which generally costs 500 Euro/semester, except in 1 state) give you an 18(?) month visa post-graduation to allow you to get a job

Some countries like Germany (which generally costs 500 Euro/semester, except in 1 state) give you an 18(?) month visa post-graduation to allow you to get a job in Germany. This particular visa actually puts you on the same hiring level (at least theoretically) as German citizens. Of course, knowing German fluently would be critical to be "on the same level" as German citizens. So, most likely you are not going to be evading the taxes, at least in places like Germany. It is almost always better to get your first job post-graduation in Germany if you have a German diploma anyways.