Just a couple of obvious comments:
Health care is already rationed - by profit motivated insurance companies.
Bureaucrats already get between patients and their doctors - they work for insurance companies.
The other day I read about a young woman in her 20s who died of untreated gall stones. She had a job and was insured but her co-pay for the necessary surgery was $5,000. Can you believe that? $5,000. She could not get anyone to do the surgery because she didn't have the co-pay. And she died. Justify that, Republicans. I just dare you. Justify that.