The problem with the proposal was they wanted a blank check, so to speak. I think people in general would support eliminating the craziest treatments on a cost/benefit basis if it were your doctor making the decision.
People with a brain between their ears are afraid of letting the government ration treatment, and rightfully so. Look at that little girl that Sebillius refused to let have an adult-sized transplant. Had a judge not intervened, she would likely have died before a suitable pediatric organ became available.
The worst part is, I believe they got their rationing panels backdoor anyway, and most people didn't catch it.
http://en.m.wikipedia.org/wiki/Independent_Payment_Advisory_Board As I understand that, they can de facto eliminate certain procedures by setting reimbursement levels to an amount where no facility will perform said procedure.