We pay engineers to cut our infra bill

In my experience, all of this is a reflection of the work or team culture. You can replace the infra cost cutting with bug squashing and write the same article. As in, is the quality of the software something that the business cares about or not? I am not even sure if incentives are necessary if quality is a part of the culture and is the expectation.

In one gig I was on, the culture was all about features, features and more features. The CEO was pushing this culture hard and it showed. You can imagine the kind of product this resulted in. Huge amounts of technical debt, replicated functionality, a high bug count and very high staff turnover. The customers were not happy at all but he just didn't seem to understand or care.

Also, 7k for image storage is crazy.

Without a complementary policy to cut salaries for introducing inefficiencies, they just created the unbounded incentive for more inefficiencies that can lead to ever larger savings.