Not nearly as much as they claim they are. The system is basically rigged in their favor. Just compare the financial statements of companies like Ford and Boeing to Eli Lilly and Novo Nordisk. Pharma does very good business.
Obviously not, but my general experience with conversations like these is that people never do the math.
If we split the profits across all of the people that "deserve reimbursement" you usually end up with a few dollars per person. Definitely, not enough to make a meaningful impact.
Additionally, the American consumer subsidizes R&D and costs for the rest of the world. America routinely pays 5x-20x more for drugs than other countries and American grants account for >50% of worldwide medical research funding (caveat: the last time I checked). Yup, even Europe is a fraction of what America pays.
I would encourage you to actually do the math and decide for yourself rather than taking (or anyone else's) word for it.