[bobthepanda]

1. Who would pass and enforce such a ban? Local governments are self interested and want more jobs, because it makes politicians look good and jobs require minimal additional services while providing lots of tax money. (See: Bay Area) State has same issues. Feds don't have the rights to do so, and good luck passing that kind of legislation anyways.

2. With the decline of the inner city during the midcentury we already saw what this looked like. It mostly resulted in jobs moving to the suburbs of established big cities, not decentralization of jobs into totally different regions.