You and I as patients obviously don't have enough training to say to the doctor, "No, I don't think this drug is going to do me much good, so I won't take it." So we have to rely on the doctor's judgement as to whether or not we need the drug. 

So anyone consider how bizarre this notion is of drug companies paying doctors who prescribe their drugs? 

It seems a bit like judges receiving payments from the accused, or knowing their salary is contingent on racking up a certain percentage of convictions each year.