Smaller Norwegian companies which offer shares to employees often have a "if you quit within 5 years, the company is allowed to buy all your shares back at the price they were when you received them" clause, or something similar. Obviously you'll only get sub-par or naïve people with such a policy.

You will probably find that some companies tries that regardless of where they are located. I doubt it is unique for any specific country.

imo I assign ownership of such policies to the founder(s) specifically rather than the nebulous concept of "companies".

Good point.