All I can cite is my wife's boss, a teacher and very left wing, who nearly got fired for talking about it.

I've been talking with him about maybe gathering the necessary data (it's available upon request but the district records people aren't exactly a sane API, you get PDF's with hundreds of pages). If I do that analysis to confirm his claim, I'll send you a link to it.

But even without the budget information, we can just look at headcount. What ratio of teachers to admin would you consider unhealthy? How many assistants to the vice principal do there need to be before it starts to look like a retirement program for people who can't be bothered to teach anymore?