To me it is not whether the girl statue is 'right' or 'wrong'.
It is that art is used for a political purpose that represents 'truth', but this art doesn't expose any secret. It opposes a mindset, but as in all things, cubbyholing an institution as wrong or as having only bad intent is a little too simplistic, don't you agree? If wall street was only populated by money-grubbing men with evil overtures that would be one thing. On the surface, it is kind of 'take that!', but deeper, where does the analogy break down as something less than the popular impression? Does it misrepresent hard-working, honest people that work on wall street as well? I don't feel that little girl statue asks this question. I feel we start to approach propaganda.
It is my opinion that real Art provokes thought, it does not dictate it, and the little girl statue is too easily interpreted as dictating thought.