No. It's reasonable to expect some sort of fluidity in what employees are willing to accept from employers, and part of what factors into that is how easy it is

No. It's reasonable to expect some sort of fluidity in what employees are willing to accept from employers, and part of what factors into that is how easy it is to get another job. If it's very difficult to go to another employer, employees will naturally accept more "bad" things from their employers than they might if they could make a phone call and get another job.