> "..when I finally pushed for bigger scope at Amazon. My manager’s initial reaction wasn’t excitement. It was something closer to “But you’re doing so well where you are.”", most managers generally push their devs to always be doing larger pieces of work, if they aren't, that's weird.

From the business perspective, it may not be good to push. If they are really good at what they currently do, the manager would need to find a replacement, and there is no certainty that the old worker provides more value in the different job. When only the money is weighted, this will happen often. Seems to fit for Amazon's work culture.