Yep, and that's the difference in morality between the dictatorship at the government level where it's very hard to move and sometimes not allowed, compared to a company level where it's easy to move.
Nonsense.
A wife can many times leave an abusive husband. Does that make the situation morally acceptable?
Your method to judge the morality of situations is not very well thought out.
In this context "abusive" refers to physical violence--a criminal act.
If a boss is beating a worker it would be equivalent--but how often does that happen??