You're describing how a functioning society with a functioning government works in a textbook. In reality it might not be all the way at the "gang" end of the

You're describing how a functioning society with a functioning government works in a textbook. In reality it might not be all the way at the "gang" end of the spectrum but I assure you it is closer to that extreme than your comment appears to place it. There's a lot of gang-like behavior once you scratch the surface. It's just more diverse and indirect than using violence against people who don't respect your authority. When person from department A tells person from department B to shove it department A doesn't send thugs to beat them up, they simply make sure that the friends and relatives of the person from department B get stonewalled in any interaction with department A.