Just for discussion from looking at it from the opposite end... After WW II, US provided all of the defense for the western European countries for a long time. In the past I wondered how those countries were becoming wealthier than the US, then realized that the US paid for the European defense while allowing them to offer things like free healthcare and more generous retirement benefits. Why should the European countries continue to get a free ride on defense expenditure, using the freed-up money for social programs that the US can't afford for itself?
As to the wealthy aspect, the divide between common people and the ultra wealthy is a problem and continues to get worse in the US. With this and many other things, the US is also sliding into the abyss, it's just some number of years behind the European countries.
UK / EU healthcare is paid for by taxes. Just take a look at the difference. We have 20% sales tax on everything but food and clothing. Our "Gas" (Petrol / Diesel) is far more expensive than yours because of taxation....and it continues. You could have free healthcare if many of your providers didn't charge so much and you were taxed to pay for it.
eg. Tax on a vehicle up to £2745 for the 1st year, then an additional £410 a year for the next 4 years after that (5 years total) if the vehicles worth more than £40k plus £190 a year as standard rate forever which goes up by inflation every year. Low emmission vehicles pay a much lower initial amount, but a typical large engined US vehicle will be at the upper end.
A gallon of diesel is on average $8.37.
Income Tax is 20% or 40% if you earn over £5k, and 45% if you earn more than £125k.
Council Tax runs at around $200 a month.
Heating lighting even for what would be a very compact US home around $250 a month+.
Thats just the tip of the iceberg. There are hundreds of taxes. You want to know where our free healthcare comes from? We pay for it, not the US!
..and don't think it's that great either. Expect a 12-24hr wait in A&E to get seen unless immediately life threatening. Up to 5yrs wait for a non urgent operation. You'll be on a shared ward with shared toilets and only a curtain between beds. Many hospitals are no longer cleaned properly because of cuts and areas go months without cleaning which means infection is rife.
This is a tyical UK hosital ward (labeit this is an empty brand new one so ultra clean and without the clutter - 6 people looking at each other in shared rooms: