Ok, this is a challenge to any of homonculus's patients. I bet there is some drug company reference somewhere in his or her office. (Look at the clock, everyone's got a Lisinopril clock.)
All joking apart, the inducements to GP's are probably few and far between, the Medicines Management Gestapo regulate this sort of thing robustly. I suspect it's still more of a problem in secondary care, loss leaders still seem to filter down to us in primary care-(who usually take on the role of life long prescribing.)
Although bodies such as NICE and the other quango's that have gone bust get knocked, they were initially very effective at spending tax payers on interventions which improved health. (They got a bit wooly in the end though.)
Oh well, time to strengthen 'me teeth with having a glass of flouridated water. (Bloody mass medicators.)