America spends a greater percentage of government money on healthcare than many systems with universal healthcare. Medicare, Medicaid, and Veterans Affairs and Military medical spending are about 7% of GDP. Add another 1-3% and you would be ahead of almost everyone.

And that would still be a savings of 7% of GDP.

Not providing universal healthcare is entirely a political cocktail of wasting the money, letting big corporations loot it with tactics like using many partial vials of medicine instead of a full vial, letting the medical professional groups stuff up the pipeline of medical practitioners, and electing members who did all of the above to Congress.