Then I would have thought the answer was obvious, you must teach them how to be free. If you wish some pointers, may I remind you that I have done this before.
And think on this as well, how many of those who are enslaved to pay off a debt were manipulated into those debts by greedy Magisters who wanted labour they did not have to pay for? A vulnerable person is very easily manipulated and it is not difficult if you already possess power and influence to make a person vulnerable.