It's effectively agreed upon that "heroic measures" while approaching EOL are both a bad use of funds and also of questionable value to the patient.

That said, the OP context was about denying healthcare to "the poors". Period. It has nothing to do with the slippery slope of "lost causes".

Bear in mind that the OP's political party is stridently against any sort of public health care options, and that's what is driving her stance.