- Automation. Not talking AI. Just old-fashioned mechanical engineering and micro-controllers. Not going to name any names, but almost every practical thing you buy is made in only a handful of factories, and those factories don't need very many people to run at full-tilt.[0]
- BS Jobs. Most of the US defense spending is make-work for engineers/welders/managers/subcontractors/etc working on projects of dubious strategic value. It sure as hell doesn't go to the soldiers. 30% of hospital payroll is admin staff. Higher ed is the same story.
[0] https://www.bloomberg.com/news/articles/2017-06-21/how-just-...