I disagree with arguing (provably wrong) theory in the face of hard data (which disproves said theory) - drugs and care are significantly cheaper in every single payer market, and provide better outcomes as measured by life expectancy and many other measures.

> So it's pretty hard to look at what people are spending in two different places for two different things, with a probably large subsidy involved, and conclude that a theory about supply and demand for identical goods in a free market is wrong.

It's actually quite easy, just like you do with e.g. a McDonald's meal or a bottle of coke (e.g. the US subsidies these indirectly through corn subsidies, no other country does). It's not the same everywhere, not by a long shot, but it's functionally quite close.

Same drugs and similar are cost much more in the US.

The market is not free - it is illegal for you to have your medicine shipped from Canada or India or anywhere else.