Morality and libertarianism in The Dark Knight

Review of The Dark Knight on, of all places, the Mises Economics Blog (spoilers).

Jeffrey Tucker notes that the movie is awesome (agreed), praises how the movie addresses the theme of morality and evil (also agreed), and opines that the film represents an endorsement of the free market and that government regulation results in the Joker (I think that is stretching it, at least I don't think the filmmakers had that message in mind).