If the teachers make students more proficient with a faster learning, teachers have more money ก้จะทำ it is motivating for teachers and students are working harder and more.
If you put up a good student, learning faster than teachers to have more money. It therefore urged the teachers care about students and works very hard.
If the teacher makes students better, there are learning faster can makes me more money. It is activated in the teacher attentive students and work harder!