I've been living in the US for almost 7 years, and this is news to me. As far as I understand, Medicare only applies to people who are 65+ years old, and Medicaid only applies to families with certain income (relative to family size). What did I miss?
> The USA doesn't (generally) let people die if they can't afford healthcare (people may be driven into bankruptcy, but they won't be left to die), so those costs are all getting paid by the public.
As COVID-19 has demonstrated quite effectively, death is not the only outcome to focus on. Also, driving a person into bankruptcy or otherwise ruining their future is not what I would call "healthcare paid for by everyone".
I am sincerely hoping that I have missed something in your arguments.