Marginal Revolution: Is federalism unfair to urbanites?

SOURCE:  http://www.marginalrevolution.com/

Is federalism unfair to urbanites?
Ed Glaeser writes:

Poor people come to cities because urban areas offer economic opportunity, better social services, and the chance to get by without an automobile. Yet the sheer numbers of urban poor make it more costly to provide basic city services, like education and safety, and those costs are borne by the city's more prosperous residents. Taking care of America's poor should be the responsibility of all Americans. When we ask urban residents to pick up the tab for educating the urban poor, then we are imposing an unfair tax on those residents. That tax artificially restricts the growth of our dynamic cities...MORE