Sigh. What can I say? Google it, and at the VERY TOP of the results page is a graph that is captioned "Per capita out-of-pocket expenditures 1970-2021". To the right of it is another graph entitled "Total national health expenditures, US $ per capita, 1970-2021".
Not sure if I see it.
If it's a total expenditure graph, then surely it's obvious that expanding coverage would cost money?