It sounds kind of crazy on the surface but it makes sense - what else would you do if you completely lost faith in the police force to do its job effectively? It would probably seen easier to disband it and replace it with something else than to try and reform such an organization.
The city budget funds the police, which funds the union, and they donate their money to the attorney general, mayor, and city council members. Often when they don't get the budget they demand, police will openly retaliate against local businesses and residents who did not support their budget.