I'm a bit lost about what the argument is about here.
Is any affordable private insurance currently accepting to reimburse foreign experimental treatment with no maximum amount?
Or do the ACA forbid citizens from paying with their own money for whatever extra medical procedure (or non medical like room amenities in the hospital) they want?
Or do our resident right-wingers think a UHC system would forbid that, or is it even actually happening? (even our French "sécurité sociale" doesn't, but maybe I'm misinformed about the UK?)
If there is no "yes" answer to any of those questions, I don't uderstand what all that "hypothetical scenarii debate" is about.