in a similar vein, my aunt who is going for a few more years than your mom noted that the ratio of non teaching jobs to teaching narrowed considerably and she ended moving from a city system to a county system because of all the appointees from the mayor's office which ate up funds they could use for other needs. throw in that many of the non teaching jobs are being held in higher regard and also quick to deflect the ire of parents onto the teachers and it is hard to see the reward. he latest beef in the last decade has been the rise of "student rights" - as in you have to tip toe around some who take offense at everything with mommy and daddy riding to the rescue and the admins throwning the teacher under the bus.
Administrators do have to deal with parents, and with the press, and with the police, etc. I'm not saying their job is more important than teaching, but they will be the ones facing the public when anything bad or embarrassing happens at the school.
As someone noted above, the ratio of administrators (especially in district offices) and the actual teachers teaching kids has narrowed recently.
I remember reading an article of Michelle Rhee when she was head of Washington DC School district. At beginning of her term, she got lost in the district HQ and walked into a room where a lady was sitting in front of a computer. Rhee asked what her job was, and she couldn't answer. And soon enough, a purge of the HQ district office was implemented.
You can agree with her or not, but no doubt there is a lot of unnecessary people on payroll in places like school district HQ.