"Intelligence" services cost taxpayers billions a year, so the billion dollar question is why is it possible to dial in to "official" military communications over insecure channels at all?

Why doesn't the government run their own signal or matrix infra? Why are they paying Cisco, and introducing the numerous attack vectors of a proprietary optionally-encrypted service?

The threat of surveillance capitalism isn't just in the dragnet surveillance of the population. It's in the profiteering of "partnerships" between private and public — the drive of corrupt and incompetent political and military leadership to direct funds to sub-optimal proprietary services and protocols, instead of leveraging public funding to contribute to open-source and make hardened systems ubiquitous.

We are talking about the person/department that has ensured that they run an especially secure, certified, version of webex losing their job right?

As much as I'd like to think that senior military people have some basic awareness about security, this is really a tool that was considered secure by the organisation. Sounds like a big gaping whole letting dialin enabled for anyone to use.

Not even. A Pringles can and some wire.