Yes, as a matter of fact there have been many foreign teachers who have convinced their
bosses that training schools should provide a proper education, AND THEN the bosses see
money and change their minds again

That is not the case in all situations. By showing the bosses that they can make more money if they do offer quality most bosses would do so. i am not saying that it is easy to do so but it can be done. The problem is usually the fear of loss of job that new people face which will continue to help crappy training schools stay alive.
The responsability of people that have been here for a while is to protect those people and not misuse their position. By doing so everyone can have a successful chance to develop as teachers.
For the owners who have no clue it is the choice of the individual as to wether they want to educate the boss or not. if not do not work at that school, but if the answer is yes it will be difficult but not impossible.
I believe we share the same opinion about the problems that foreign teachers have but differ on how to resolve the situation.