I would only add the caveat that under a free market system single-payer may still be more appropriate for emergency care, since you can't make a consumer choic

I would only add the caveat that under a free market system single-payer may still be more appropriate for emergency care, since you can't make a consumer choice in the middle of having a stroke. The fallacy that healthcare is a monolithic field which can necessarily be equally served across the board by any particular regime is catastrophic to the debate. There are completely different requirements, limitations, time scales, etc. between an ER, a family practice, a specialist pediatric cancer ward, a cosmetic surgery clinic, etc.