It will also show the parent body that rebbeim are not shmattes. I have many friends who are top notch rebbeim, ones who could just as easily be CPAs or network administrators. They choose to be in chinuch becuase they want to.. not because they have to. They have the training, have the skills, and as a result, have jobs in $ solvent mosdos.
Not to say the striking school is not cash rich and the rebbeim are not on top of the game, but if the conditions warrant it (and it sounds like it does) they should leave the school high and dry.