What's the difference between a felon and a slave?

A slave has never been judged to have done anything requiring admonition by society. A convicted felon is in servitude because the society he or she lived in has declared that their actions are not acceptable to that society and that they will be punished for their transgression. Criminals must accept societies regulations or they will be placed in a position of servitude to that society. Slaves were in servitude for no fault of their own, but simply for profit. Both were exploited, some with "justice" as a motive, however slaves were not an issue or justice but of god's empowerment and a profit motive.