For what it's worth I know you've worked on FHIR and probably know a lot of details I don't. Actually I'd be interested in talking to you about FHIR.
That said!
1) In the big picture isn't the US clearly paying more than other countries? I'm sure some of this is eg a janitor in the US costs more than a janitor elsewhere, but still...
2) Isn't the cap for the margin that insurance companies can take 20%? That is, they have to pay out 80% as claims take 20% for overhead
3) Doesn't insurance also induce more work done by everyone else who has to deal with them? So the margin the insurance company itself takes is not the only cost they add. Maybe they make providers do more paperwork, or let patients order tests etc that they would not if they were not spending other people's money, or some other reason. Say insurance pays out 80%, but 30% of documentation or actual work is not done by insurance but only exists because of them, now we're down to 56%.
I say this because literally yesterday, my wife, a pediatrician, after she spent the day seeing patients and got home to go through notes, had to leave a message with an insurance company: she saw they faxed her clinic on Saturday, when the clinic was closed, to cancel care for a patient with an ongoing chronic condition with no changes unless the insurance company got a reply in 48 hours (again, while the clinic was closed!). Now she has to schedule some kind of I don't even know what with them, to confirm the condition is the exact same, except she sees patients all day so it's a pain to schedule...
idk the fact that BCBS is a non profit and has no margin in some technical sense does not seem like a big consolation, something is rotten no?
(edit - the insurance company in the anecdote is not BCBS)