“There’s only one reason why they’re requiring you to use a more expensive product,” Mr. Frankil said. “Because somewhere down the road, somebody is earning more money.”
The brand-name maker would like the generic market to dry up, so it may be as simple as the brand-name maker selling its product at a reduced price on condition that the insurer cuts off the generics. Given that some patients demand brand-name drugs and some doctors acquiesce, this may be cheaper for the insurer.
My doctor has a straightforward attitude - referring to patients who demand brand-name drugs "I told them 'I take generics. My kids take generics. If you won't take generics, find another doctor!'" (that was before the practice described here emerged. I am sure he has something to say about it...)
This is overall good, because insurance is one of the few industries that benefits from monopoly conditions (bigger risk pools are better), so you want a hard cap on how much money the monopolies can extract. But maybe demanding non-generics is a way to increase "medical losses", which in turn is a way to increase their permissible profits?