In one sense, this is a little true: It's easier and more efficient to provide access to the various safety net services in a city. Just like you can support a

In one sense, this is a little true: It's easier and more efficient to provide access to the various safety net services in a city. Just like you can support a niche store in a big city that would never see enough customers to survive in a small town. Population density improves the "customer":"provider resource" ratio. Access to lots of other services is better too... In the core of the large city I live in, there are so many emergency rooms/clinics that it would be difficult to be outside of walking distance of emergency care. That's much harder to do (and a poor allocation of resources) in rural Oklahoma, but it means my access to medical care is dramatically better.