That and having a dynamic housing market; flexibility in other services e.g. schools, so that people can move where work is, and move somewhere else when they'r

That and having a dynamic housing market; flexibility in other services e.g. schools, so that people can move where work is, and move somewhere else when they're not working; and building mixed-use neighbourhoods that have schools, doctors, sports facilities and so on. Not sure how the US handles that, but in my country (UK) there are various factors that mean people don't move as much as common sense might suggest. High sales tax on houses, very variable quality of schools meaning the good ones are oversubscribed and if you move your kids may end up at a worse school some distance away, and so on.