Well, it doesn't help but that's where the money is and as a society we should want people to move where they are most productive. Geoffrey West shows in Scale

Well, it doesn't help but that's where the money is and as a society we should want people to move where they are most productive. Geoffrey West shows in Scale that social outcomes like GDP, patents, etc. but also crime grow with a factor of 1.15 while infrastructure needs like pipes, wires, heating cost, gas stations, etc only shake with a factor of 0.85. So it should be highly desirable to have larger, denser cities. Unfortunately, it seems that once the boomers had stepped into adult hood and bought there first homes, we decided that cities are complete now and existing neighborhoods shall not change anymore.