While the Govts are being encouraged to completely trust Megapol with their policing, they're not dumb enough to actually do so. Without keeping at least some semblance of a civilized society within the poorer communities, these quickly become ruled by gangs and populated by people who owe nothing to the uncaring govts. This ungrateful task of extending law's protection into the slums falls onto those foolish, poorly funded individuals, who usually try to help the disheveled masses at least a bit, despite the world telling them it makes no sense whatsoever. Many of them are corrupt, violent, or addicted to drugs, but they're still much better than Megapol or Highwayman death squads. However, communities which enjoy even this dubious protection of Govt Detectives are few and far between.