Corruption is how the privileged share their privilege (Latin for "private law") with the un-privileged. Sharing is good, right?
Their findings make a lot of intuitive sense - most people will continue to cooperate to keep their society together, in part because they don't want to be punished by law enforcers. People will tolerate a certain amount of corruption from their leaders and law enforcers as long as there isn't too much of it. Above a certain level of corruption, people stop seeing the point of cooperating and society begins to break down.
 
