Isn't one of the main reasons why American Health Care is so much more expensive in the USA that in much of the rest of the world is that it is a business? Designed to make money. In Canada and Europe you can cut the cost by whatever the cumulative profit margin is for drug distribution, lab work, medical insurance and hospitals. The total cost is borne by the tax payer and no profit is expected.

I'm not sure if costs for the rest of the world would go up for drugs. I don't think they currently differ much at source, however instead of there being a distribution margin added to the top of the cost, as in the USA, there is a subsidy from taxation, provided in Canada and in the UK. And I think, but stand to be corrected, that the time for which patents for drugs are protected is shorter in the rest of the world than in the USA.

I do think that there is a danger that if the US moved to a social medicine system, that the engine of research, the profits derived from the medical industry, would stall and we would see fewer medical breakthroughs.