Really, triage nurses in ERs decide that certain patients will not get treated, period, end of story?
Triage is a legitimate practice, of course, but comparing “belly pain, you go in ahead of the guy with the cut toe even if he is dripping blood on the carpet” is a world away from “no treatment for you, Granny.”
In a disaster, really.
It's not so much denying care to patient A who will die regardless, nor denying care to patient B who will live regardless, it is making sure that patient C who will only survive with treatment gets treatment.