I am currently a staff member at a well-known U.S. research University. I have been so for around 10 years.
I have noticed a rise in the view that administrative staff are an inevitable and unnecessary accretion within higher ed.
I find it hard to imagine the Campus network being built and maintained in the manner you propose. My area is information security. I equally cannot fathom faculty taking an interest in incident response duties, or dealing with network intrusion detection, or that kind of thing. We have seen what life is like without these functions. Quickly the Campus network is overrun with compromised devices, the rest of the world begins shunning the Campus address space, and the network becomes more and more unusable. This is, contrary to what we might hope, a full time responsibility. I cannot imagine any faculty who would be interested in dealing with PCI or HIPAA compliance in order to use credit cards, or run a health clinic or hospital.
Is there really no place for any kind of administrative staff? Once you let in and feed a few rats, they just breed, multiply and overrun the place?
I do find it troubling that I earn more than graduate student instructor or indeed many junior faculty. It is less than what I would make in private enterprise. I don't know how to justify this, or indeed what the way to address it if indeed many staff positions are (as I believe) essential.
In the end, I am no longer interested in trying to answer this question. However much I might have believed in the mission of higher education has been eroded by my dislike of being increasingly considered vermin. I will be leaving higher ed, and take that even higher salary. This has, as I have observed at least at my University, increasingly been the path of the more skilled tech folks.