My impression is that the FAANG companies have a relatively small part of the company that makes them insane amounts of money (e.g. search ads) and then the rest of the company is just soaking up a lot of that money. In this model of the universe FAANG companies are just over paying software developers and the other companies out there without their own infinite money machine shouldn't actually be learning the lesson that they need to pay their developers more because maybe, as a business priority, they shouldn't be.