Re: The salary for the teachers ..
As a general observation, teachers’ motivation is derived largely from how they are ‘enabled’ by the environment (school admin and students’ behavior, particularly) to do their job. Generally, the difference between ‘good teachers’ and ‘bad teachers’ stems from how ‘happy’ they are in the profession. Better schools are better because they take care of the teachers. Put a great teacher to work with a terrible principal and you’d see him/her either demoralized or leave the school.