I'd never want to do any of those jobs, all three of them have positively awful working conditions, with the last usually resulting in lifelong mental damage from repeated jarring of the head (in addition to injuries), and most school districts & airlines push their teachers and pilots to the edge of the law, whether it be student load (and putting special needs students in classes with overloaded teachers illegally), or leaning on pilots to fly with the absolute minimum fuel they can get by with, despite regulations.
> leaning on pilots to fly with the absolute minimum fuel they can get by with, despite regulations
You mean, asking pilots to use the minimum amount of fuel that is safe. Do you have any evidence that a major airline has ever pressured pilots to use less fuel than the (generous) regulated minimum?
Each of those factors alone can make for a bad work environment, combined it is a living nightmare. Plus the pay is very low, so its not as though you are able to afford much.
Shit must be real bad over there if they are attempting to unionize, if you notice the only places that still have a union in the US in spite of union busting are where the employer has made it an absolute living nightmare to work, hence the union to back the workers up.