At the end, someone will be there desperate enough to follow the boss's whim. Always.
That is why regulation is so important.
We need regulation, yes, but also people who have a sense of goodness. We can’t legislate every aspect of a respectable society.
Their boss hired GP over others for a reason. The person who is finally desperate enough to do it might be just a little worse at their job, a little more expensive, ... It will have a cost.
German has a related expression "vorrauseilender Gehorsam" (anticipatory obedience), where people will do evil long before they are forced to because of such strategic considerations. You must never rush to give up your morals, there will be plenty of time to do so later.