A super majority of the medical R&D is funded by the US system. The gov run systems pay for a minimum of it. Of the U.S. adopts a system like other gov run countries where does the medical R&D get financed?
You can find the health R&D expenditure data here: https://www.oecd-ilibrary.org/sites/health_glance-2017-72-en...
It shows the U.S. spending 2.4x that of Europe on pharma expenditure as a % of GDP, and 3.2x that of Europe on government R&D health budgets as a % of GDP.
Edit: somewhat newer data is here https://www.oecd-ilibrary.org/sites/fc8b43f4-en/index.html?i...
It shows that the R&D pharma spending gap has actually increased even further to 3.5x.
You could pick the next most expensive country's plan, triple US R&D expenditures, and still spend way less. The GP's point about it not being outsized is correct.
A solution to which problem?
The solution to the problem of private equity running the medical system is government-run health care, like in most other nations, who spend less on health care per person than the US but whose populations are nonetheless healthier.
Or are you talking about the problem of the severe ideological divide? Or some other problem?