I was meaning the NHS in the UK. I'd not heard the phrase "single-payer healthcare" before and sort of assumed it was some form of "health insurance" thing, but one significantly less insane than the American system.
I tried looking at the Wikipaedia page for it, but now it's even less clear - it says "The term was coined in the 1990s to characterize the differences between the Canadian healthcare system with those such as the United Kingdom's NHS", suggesting it very much means "not the NHS" - though it also mentions UK healthcare elsewhere on the page???
Anyway, the essence of the point is the same - the way the American system works is insane and barbaric, and there are better, proven to work, options available which are currently used in other countries :)