You know, author SIR Terry Prachett has outlined in his Discworld novels what, IMO, is nearly the ideal government: Namely the Patrician of Ankh-Morpork realized that, no matter how much money he spent and effort he put forth, he'd never be able to eliminate crime on the streets of the city-state (particularly since, prior to his rise to power, Ankh-Morpork made modern Chicago look downright safe!), so what he did was basically authorized the thieves' guild and the assassins' guild, along with the city watch, to go after unlicensed thieves and murderers, while keeping their own authorized thievery and killing under a certain level (not hard with the Assassins' Guild, since, as Terry pointed out in one of his infamous footnotes, "The Assassins' Guild puts a high value on human life, which is why they charge such hefty fees to take it away...").