Morning,
Sounds like you all work for crap schools, especially the ones that only have 1hr 15min slots per lesson.
When I was an instructor I was forced to take two days off per week so as not to burn myself out and have more energy for my students. Didn't agree with it at first (as was worried that I would fly less and earn less money), but soon learned to appreciate it - all down to the CFI monitoring standards.
Nice idea about some sort of FI union WB.
L.