(the plain reading of the 14th Amendment says the US government can never default)
The
plain reading of the (relevant clause of the) 14th amendment is "The validity of the public debt of the United States, authorized by law, including debts incurred for payment of pensions and bounties for services in suppressing insurrection or rebellion, shall not be questioned.", which sounds more like a prior restraint on speech. Defaulting on a debt is certainly not the same thing as questioning its validity - the debt was
valid, you just
can't pay it. The Supreme Court
has established precedent that 14A prevents Congress from cancelling lawfully authorized debt, but cancelling is also not the same thing as defaulting. Of course, many professors have pontificated about this, but assuming what the Supreme Court will do is a fools' errand.
And hitting the debt limit doesn't trigger a default anyway.
You'd think someone who understands the world through money-flows wouldn't be ideologically bound to presume that the government must necessarily act more wasteful than an army of middle-men with profit motives.
It's fair to theorize that single-payer could provide similar value in terms of socializing risk, although it will do so less efficiently by design
... you are aware that most supporters of single-payer healthcare, including in this very thread, repeatedly cite as one of the benefits of single-payer health care that the government will have to spend more money on care than insurance companies are currently willing to do, keep grandpa alive a couple months longer for you, and not triage spending to keep it within the budget of premiums, right? That's "less efficient by design": your money being diverted toward paying for cases someone has already decided aren't worth the cost, whether you like it or not. The profit motive of the army of middle men is specifically to waste LESS money, so there is more profit to pay the employees with. It's not that I assume the government is more wasteful just because - it's that this is what people are asking for.