Do you not get paid for doing your job?
I'm glad that you've condensed this down to commercial imperatives, it's the nub of the issue.
People think that the industry has their best interest at heart and they can do no wrong. Once money is involved, all bets are off.
Take a guess at which company has been given the largest fine in history for corruption and mis-selling?
When you buy a car, do you not think to yourself that the sales guy might have an interest in your purchase? Why would a GP who's very livelihood depends on the income they generate not be swayed either consciously or subconsciously to act in a certain way.
They're not saints, they're people with all the same foibles as a second hand car salesman.