Easily my favorite films.
Right from the first scene you see that the world is controlled by two competing mores.
First, the surface world where law & order seemingly rule in a land where everyone is equal. Second, the underworld which truly defines what law & order means for a certain class of people.
This reveals something we all know: There are rules that apply to everyone and there is another set of rules which appear to not apply to everyone.
Such is the way of the world. Such is the way of the world. Such is the way of the world.