This may be true where switching jobs might buy you a 7% or 12% pay increase. But in a field where switching jobs can result in a 100% or more pay increase, money itself can become a primary motivator. There are people reading this who make $80k that are doing literally the same work as someone else in their town who is making $300k or more.

Maybe $80k -> $100k isn't a primary motivator, but $80k -> $300k is more of a "retire earlier" type of motivator.