I don’t think anyone in senior management actually thinks like that. The company works on a plan (for better or worse), and the resources needed to fulfill it.

There are teams for maintaining massive services where you can build promo packets with a couple <1% cost reduction PRs. I've worked on a non Amazon but similar team where half our M2's org charter was explicitly cost reduction with KPIs of x dollars saved (measured using CPU/memory/etc that we had formulas to convert to infra dollar equivalents).