The person in question does not have a terminal illness. If her food and water were denied, she'd die of starvation/dehydration, but not of a terminal condition.
"allocate scarce resources" - I hope that doesn't mean letting someone live or making them die is to be a matter of cost effectiveness and the bottom line. I don't want those kind of decisions made by bean counters.
I don't think it is really like that. Nobody is counting beans.
I'll be redundant:
You've got three ambulances, You can transport up to 12 patients. You've got 30 injured in a car accident.
Which ones do you take?
I'll explain it. You make three piles. Ones that are likely to live anyway, ones that are probably going to die or who are dead, and ones that you might be able to help.
The third group goes. It goes as fast as you can get it there. The other two stay on the pavement.
You have a better idea?