In the Annotated Pratchett, the entry for Night Watch outlines parallels with Les Miserables, and a point is brought up which states:

“Javert, the policeman in LM, is concerned only with justice, which he defines as the punishment of the guilty. Vimes, the policeman in NW, is equally obsessed by justice, but he defines it as the protection of the innocent.”, which I think is an interesting distinction and which seems to be relevant now.