Your example is so outlandish, it serves no purpose.
In your scenario you are adding an incentive to a single commit murder. You are trying to make the point justice is not about utilitarianism but about morality on some level - but your example is so unmoored from reality that it is useless.
In your scenario you are adding an incentive to a single commit murder. You are trying to make the point justice is not about utilitarianism but about morality on some level - but your example is so unmoored from reality that it is useless.