Public schools exist in perpetuity whether they are good, bad, or indifferent. If the students in a school are not achieving, unmotivated, and disinterested in learning, schools are given extra money for remediation programs such as those for students at-risk or truants. School people operate with the belief that any weaknesses or problems present in a school, among students, in the leadership, or the organization, can best be solved by spending more money on more specialized programs. Try and run a business with such mentality and philosophy and you will be banished. If a plant manager asks for more money to boost an inept worker's production, or to motivate the worker to get out of bed and come to work, the manager will be fired.
Educators never give up on anyone.
Lifetime job security and tenure are two deeply ingrained concepts in public schools. Educators believe that each teacher, administrator, or student is educable, worthy of training, and each deserves a second, third, and fourth chance. Educators are trained to forgive, forget, and never give up on people. Business pays its workers based on production, merit, and performance. School districts and teacher unions are not inclined to even consider merit pay for quality and excellence.