Uh I mean, that seems a bit conspiratorial. I'd say that the "pass rate" varies by each class at each airline and that honestly, most instructors will try their best to get you through if you show that you are putting in the work. Honestly, most people who don't get through class do it to themselves in one way or the other. Just how it goes. I don't see the need for an airline to have some "quota" or percentage of people it needs to fail.