Status Updates From Men at Arms (Discworld, #15)

“He hadn’t had much experience with the rich and powerful. Coopers didn’t, as a rule. It wasn’t that they were less prone to committing crimes, it was just that the crimes they committed tended to be so far above the normal level of criminality that they were beyond the reach of men with bad boots and rusting mail. Owning a hundred slum properties wasn’t a crime, although living in one was, almost.”

"The Guard seldom drank in Ankh-Morpork's more cheerful taverns when they were off duty. It was too easy to see something there that would put them back on the duty again. Suicide, for example. Murder was fairly uncommon in Ankh-Morpork but there were a lot of suicides, too. Walking nighttime in The Shades was suicide. Saying "got rocks in your head?" to a troll was suicide. You could commit suicide very easily."

"A great many rulers, good and bad and quite often dead, know what happened; a rare few actually manage, by dint of much effort, to know what's happening. Lord Vetinari considered both types to lack ambition."