It just looks like human nature to me.

It's fun (and good for a career) to set up 'cybercommands' and looking-through-keyhole departments with a large logistical tail. Secrety organizations are easier to fund and harder to shutdown.

I'd say that you are simply seeing the natural result of a top-heavy military with less to do than meets the eye. Feature creep is a thing, especially in a growth industry.

Ideally, the various factions that run an increasingly imperial government each have their own intelligence services or even multiple ones that are controlled via competition.