Would you advise them to leave and risk not being able to put food on the table if they can't find another position? If there's little to no opportunity for lateral movement in their job market right now?
Again, would you advise them to stay and subject themselves to they type of treatment they did not agree with?
But I will give you the benefit of the doubt. Vulnerable populations can have their employment opportunities gamed by powerful groups where they are essentially enslaved by their reliance on their paycheck to support their family, food, housing, etc. I don't understand why this doesn't register with you.