This is a good take. Single payer might work in the USA using HMO plans funded by taxes, income/asset linked tiers of coinsurance, tax increases, major efficiency corrections, reduced barriers to entry, and mix of deregulation and regulation to increase competition.

Also, the US healthcare system is the excellent and one of the world's best if :

A) you have good insurance or medicaid/medicare in the right place.

B) you have transport to potentially drive some distance to deal with occasional wait times or to find in-network providers

C) you can navigate the sometimes byzantine billing nightmares that can occur where your coverage is denied on medically necessary or contractually covered care; or your enrollment in a subsidized program is denied, late; or you are indigent, incapacitated or elderly need an advocate to assure you get enrolled in correct coverage.