You can’t buy a education.
A similar, but less extreme trend exists in higher education administration, but not in faculty, just administration: over the past 10 years at my university, we had enrollment go up about 20%, while the faculty shrank by 0.4% and the administration grew by 50%. (And, individual administrative salaries rose in real terms by about 10%, while faculty salaries barely kept pace with inflation over the same period.)
Ding-a-ling ... we have a winner. Finally someone figured out that we went from one dedicated professional teacher to 25 -35 children with a great deal of success to one totally disinterested union teacher, 5 teachers assistants to 10 -15 children with little or no success. From one principal, who sometimes subbed for missing teachers to one principal, 6 vice principals with each having a secretary and assistant.