Woah woah woah there. Are you really saying doctors don't read the latest research so that they can make a greater profit? Really?
You could have at least picked a more realistic example of misaligned incentives in medicine... e.g. using a more expensive drill bit during a surgery because you know that the surgical rep will take you out to a nice dinner every time he's in town.
There's a huge population of doctors. Some ethical. Some unethical. But I believe the profession does a pretty admirable job of stamping out immoral behavior when it finds it.