As a former tenured professor I thought a lot about this issue. The underlying problem is that administrative staff create work to justify their existence. The more administrative staff you employ the more you need to employ. I was on the academic council for a couple of years (itself a huge waste of resources and time) so I got to put up a proposal that we get rid of all administrative staff and replace them with ac…
There was also substantially fewer federal research grants and the associated paperwork required to receive those grants. You'd be surprised how much administrative work is required to receive federal grants and to employ the domestic and international researchers that do said research. (Effort reporting, Visa applications and processing, expenditure justification, backup and reconciliation, etc.)