[learnstats2]

> How long before it's impossible to work for a decent salary (which are already not that decent in France).

So, it is already impossible for the person in Ukraine to work for what you consider a decent salary.

The people above you on this scale are using politics to make sure your salary and opportunities stay low as well. You get a monopoly type of advantage here, but you can't compete fairly in other countries and in other situations, when you are a consumer.

This is a power structure that should not be something you seek to maintain. I doubt closed borders benefit you, except on a very short-term scale.