As an example, here is the UC system:
https://lao.ca.gov/Publications/Report/4511
https://accountability.universityofcalifornia.edu/2021/chapt...
About 70% of the UC budget goes to salaries and benefits. Of that, 70% of staff is non-academic.
Full context below:
Non-academic staff employees constitute nearly 70 percent of UC’s workforce and are responsible for health services, student services, instruction and research support, compliance, and general administration (6.1.1). In October 2020, this group included 143,188 individuals. Overall, this staff workforce represented over 115,577 full-time equivalent (FTE) employees in that month.
STAFF WORKFORCE About six out of every ten UC staff FTE are working for the University of California Health system. These frontline workers (including doctors, nurses, administrators, technicians, and allied health professionals) are playing a critical role in California’s response to the COVID-19 pandemic. Over 97 percent of these employees are supported by non-core funds, typically the revenues generated by hospital services. Students often work part-time on campus as part of their financial aid packages or for research experience. During the pandemic, UC campuses transitioned to remote instruction. With staff, faculty, and students no longer on campus, student employee headcount at general campus halved from 36,000 in October 2019 to 18,000 in October 2020. General campus, non-student employees are the remainder of the University’s staff, at 43,752 FTE. This includes student services employees, career advisors, IT specialists, research administration, laboratory staff, food and auxiliary service workers, accountants, maintenance and janitorial staff, safety workers, and analysts (6.1.1).