Wow, I had to check your facts here, and I can’t believe it. The US federal healthcare spending is very close to the UK healthcare spending, but we cover WAY less for individuals.

The US federal govt spends >8% of GDP on healthcare, with the current system of all of our insurance and payments and everything that we have to pay in addition, totaling nearly 20% of GDP: https://www.crfb.org/papers/american-health-care-health-spen...

The UK spent 9.6% of GDP on healthcare in that same year (2017) for their publicly-funded full healthcare system: https://www.ons.gov.uk/peoplepopulationandcommunity/healthan...