If you think about it though, you're absolutely right. Not killing me is just something you should do by default. I shouldn't have to pay you to do that. If I do pay to not kill me, does that mean you can justify killing me if I stop paying you? After all, you're desperate and hungry.

Oh wait, what if you waste your stipend on drugs or "loose it" or someone steals it from you because you weren't being responsible with what was basically free money? Do you get more money to waste, or do you get to kill me now for food?