A lot of excuses project managers use to ignore technical debt is looking at the opportunity cost of building a new service vs refining an old service and saying "fuck it" and then conceptualizing their choice after the fact as a wise economic decision, then coming back to the problem after it becomes serious, then hiring someone fresh out of college to "fix it" because that's way cheaper then having the original engineer or a professional deal with a tiny fraction of exceptions the right way.

Then they move on to a new job once the debt becomes untenable. This works quite well (as an "economic" strategy) for industries of all types. I bet you can think of a few.