Earlier quoted context omitted.
The situation is not helped when proponents of single-payer say things like "there will be no denial of claims." I think there are things to support about single-payer, but it really, truly, I swear to fucking God, has trade-offs, and since it has been sold as not having any honest trade-offs, we can't actually implement the hard parts of single-player. http://www.vox.com/2016/1/17/10784528/bernie-sanders-single-...
A family friend, who was at the time the chief neurosurgeon of a significant Canadian hospital, pointed out once back in the late 80s, "America will never make single payer work because you won't be able to place a cut off where you stop paying to delay death." And of course it's completely true. The claim that there wouldn't be any "death panels" was of the most damning aspects of the legislative battle, because it…
The difference is that with most socialised systems there are two system in parallel:
A public system whose priorities set based on measured impact, rather than by . E.g. in the UK, a separate agency develops guidance independently that measures how treatments affect "quality adjusted life years".
And a private system, whose priorities are, like in the US, based on how deep your pockets are.
For the vast majority the public system is the only one they use, but about 10% pay for private insurance. In practice this acts like a good indicator:
If takeup goes up it means more patients believe NHS care is slipping and makes them feel they need to "top it up".
If prices goes up (private insurance here is exceedingly cheap, since most providers are based on you going to the NHS first and then referring you privately if you e.g. don't get to see a specialist within X days) it's an indicator the providers see NHS as deteriorating (causing more claims from their customers).
The US could do the same - continue to allow private healthcare, but cover a certain level of treatment via a public system.