I'm gonna engage my inner conspiracy theorist for a moment and try to explain why the current establishment wants vicious thugs, unthinking creatures in the guise of man, to patrol what ought to be halls of learning.
It has to do with the prison-industrial complex. The private prison industry makes a LOT of money, but they only make a lot of money if they have a lot of people incarcerated. Thus, the use some of their money to give certain administrators kickbacks and encourage an atmosphere of fear and "might makes right" in our society's most sensitive members: its children. The children respond to the presence of these howling jackals in their schools with either sullen resentment, growing a seed of distrust of authority in their minds, outright defiance, or Stockholm-esque respect for the fear they elicit in others as a symbol of control and power. The children see this and respond accordingly, the earlier you get to them, the more ingrained this response is and, thus, once they become adults, they're more likely to mouth off to police officers, more likely to disobey laws, and thus, more likely to go to the selfsame private prisons to help line the pockets of those at the head of the prison-industrial complex.
TL;DR: The system works.
