One big reason for a state based justice system is that citizen-enforced vigilance and mob justice is too random and unfair. But a side result is that the most

One big reason for a state based justice system is that citizen-enforced vigilance and mob justice is too random and unfair. But a side result is that the most powerfull people can avoid enforcement completely. When a big revolution with mob justice happens, this changes. Anyone might have their head cut off, including the rich. It is historically one of the few things that scares powerfull people into bettering the world for other people. I still hope I don't have to witness a revolution in my life, but things like this make me think one is closer than we might expect.