That's a reasonable concern. All I can say is that I left that field for a reason (well reasons) and have some serious concern about some ethical issues and attempts at gaming the system.

However by and large my concerns aren't around science (though there are exceptions, cough alzheimers), they are mostly around the marketing, pricing manipulation with regards to medicare (ever wonder why drug companies give everyone coupons?) etc. The FDA has very little to do with some of these issues and none with others (e.g. scamming the taxpayer)

In general I don't think pharma execs are necessarily nice people (though some are!) but most are not evil like the Sacklers.