> This is interesting because the USA claims to pursue a maximum capitalistic society

No it doesn't. This is silly.

Drug prices in the US are high for non-generic drugs because patent law gives the patent holder an artificial government-granted monopoly, which is blatantly not "pure" or "maximum capitalistic".

Generic drugs - where the free market does apply - in the US are as cheap or cheaper than in other countries. See [0]:

  U.S. prices for brand-name originator drugs were 422 percent of prices in
  comparison countries, while U.S. unbranded generics, which we found account for 90
  percent of U.S. prescription volume, were on average cheaper at 67 percent of
  prices in comparison countries, where on average only 41 percent of prescription
  volume is for unbranded generics.

> This is interesting because the USA claims to pursue a maximum capitalistic society

I don’t know why you think this. The US is not a maximally capitalist society. The reason drug prices are so high is due to regulations restriction who can manufacture them due to government-granted temporary monopolies through patent law.

If the US was maximally capitalist it would be a free for all with no patent protection.

Look at the development of price and quality of something that is outside the regulated medical system, like eg Lasik, and everything within that system. Its like night and day.

If we had proper competition and price discovery, things would be much better.

The US is not a capitalist society, it is a liberal society. Capitalism is a consequence of that but it isn't the reason.