The problem with your analysis is that you lump in competing interests into “Big Medicine,” namely insurance companies which have a motivation to MINIMIZE how much money gets spent on your health, and pharmaceutical companies, which have a motivation to MAXIMIZE how much money gets spent. And somewhere in the middle are hospitals, which want to maximize billable services while minimizing their own spending.
Your divides are artificial.
It is like talking about "lobbying groups" and "the government" and "the media" being "competing interests". They are not. They are all run by the same people who move back and forth freely.
And none of them have your interests at heart.