That's true, but it's not necessarily easy.
We tend to forget that city bureaucracies tend to build up over decades. The problems with restructuring in an environment like that are manifold; not just because of turf protection (which is a real issue), but also because the governmental entities are more like an organism than a set of well-defined departments -- it's often difficult to tell where one department stops and the next one starts.
Absolutely on point about bureaucracies in general. Your comment on turf protection reminded me of "Office Space" when the consultants were trying to streamline and follow the work flow.
"But I have people skills, dammit!"