In my world, there's a small portion of society who are ageless, and resurrect in a distant location immediately when receiving lethal damage on their body.
And then, there is an organization of "regular humans" which has racist views on these people, resulting in catching them and keeping as slaves or prisoners.
Given the fact that the costs of prisoners are tremendous beyond a point, they must be forced to produce value. On the other hand, if they are free, they can commit suicide easily, and thus, escape immediately by "teleporting" to a distant location.
How can the given organization keep them alive? Would brain-wash work here? (e.g. making them believe that resurrection is much more painful)