I teach at a school that is more teacher-heavy than that. 3 to 4 teachers per core area, plus languages, technology, and other electives. Compare this to two admins, one counselor, 5 office staff (one of whom took over my technology responsibilities to give me cover), and 4 custodians / plant operators. The district's curriculum specialists were shown the door.
It used to be even more teacher-heavy for awhile, but a prior administration tried to add more non-teaching positions in order to solidify power. After that administration left, we found a
It is possible to have a teacher-driven school, but it means committing to more hats than just teaching. In my case, I handle admissions scoring and course registration, as well as other issues that would normally require additional office staff.
That's the big rub of this. There are things that have to be done to keep a campus functioning. If teachers want more power, they have to assume these responsibilities, and they have to defend them, lest the school become too office-heavy. But very often, teachers (on both a personal and union level) have often taken a position of "We aren't required to do that; go away." So that position is one of the things that has caused teachers to lose power over the years.