The military - and many essential services like police, fire, healthcare - differ in that a majority of the work is not "doing" but "preparing". The military does not optimize towards cheaply increasing daily metrics of death and destruction, rather, it aims to use a targeted amount of force to achieve a particular national objective at the exact moment demand for that objective arises. Most units sit idle most of the time, in a runtime system with very low latency and variable throughput. The same analogy is obvious when you think of police(we don't want crimes committed), fire(we don't want lots of fires to fight), healthcare(we don't want tons of patients).

And that leads towards the extensive investments in training, doctrine, equipment, logistics etc. And so the majority of military employees are not "doing work" in the sense that a tech startup is, where every employee is directly engaged in optimizing the system's value chain - that kind of work occurs only in the core command, around the generals and planners and architects and researchers of the next war. The majority of the work is simply maintenance of the system so that the needed response is possible when called for.

And I believe this examined difference in organizational purpose also applies across a lot of businesses. The value chain is always shifting in surprising ways, but generally in the direction of lower maintenance.