Let me use your extreme example a different way:
Suppose the dying person doesn't have $25 for that life-saving drink of water. The water seller can refuse to sell him the water at a lesser price. The question is, should the water seller refuse, and thereby let him die?
I hope the extreme example illustrates what reading my post failed to -- namely, the possibility that there is a difference between "can" and "should".
Suppose the dying person doesn't have $25 for that life-saving drink of water.
Your comment sets forth the essence of a socialist system.
NICE!