Something I thought of (for some weird reason).
If a prisoner is waiting for death row, should she be treated as a slave because of her crime or like a human being despite her crime?
Does one's crime justify treating someone as a slave on earth despite the final consequence of their crime?
Well, I don't think I am qualified enough to make that judgment. Whether they should or should not be treated as slave and/or humans depends on the righteous judgment of a justified, true judge, whether that judge is God and/or some other entity with sufficient knowledge and understanding about the prisoner in question and/or her nature. The truth is, most [if not all] of us are extremely short-sighted and ill-equipped to make such a judgment with pin-point accuracy or even sufficient, acceptable accuracy.
BUT, let's [hypothetically] assume that in the future, there comes some immeasurably, scientifically advanced, nigh-omniscient entity [someone like Dark Phoenix Jean Grey like entity] and this entity becomes a judge because she have ALL the necessary prerequisites to be a near perfect judge and immeasurably more than that as she have other complementary tools to those prerequisite [due to her advanced inherent gifts], and she decides whether to treat a prisoner of her, in her Queendom, as a slave or human being. Now, in such a scenario, I'd say it depends on the prisoner in question and/or her nature. If the prisoner is extremely, inherently evil individual with little-to-no redeeming qualities, and she committed those crimes because that is all she can and will do, because it's her nature to do such harmful things and she will continue to do so, then I won't give two hoots if our [hypothetical] judge wants to use this inherently evil prisoner as a slave for goodness. However, if this prisoner in question is not inherently, downright evil and is inherently a sensible individual who only made some mistakes due to overwhelming circumstances, emotional state at the moment when crime was committed and/or some other inner and outer pressures that impelled her to make those mistakes, and most likely won't repeat the same behavior, then I will most likely oppose the treatment of such a prisoner as a slave rather than a sensible human being who made some mistakes.
It all depends on factors like --- The prisoner in question and/or her nature, the severity of her crimes, variables that played role in making that crime happen, and other important factors.