It is easy to make that argument. Everyone is greedy and people that want to get a return on their investments are evil. As Thomas stated, there are plenty of costs medical personnel have to pay just to become medical personnel. Also, ask yourself this, why do a majority of breakthrough drugs come from the U.S.?
https://www.quora.com/What-countries-have-lead-the-world-in-medical-research-and-innovation-in-the-past-20-years
There is a reason for that and it isn't benevolence.