It scales just fine. The continental USA can hold about 200000 of these, with a total population of 6 to 12 billion. (hey, that's everybody!)
Scale by making more cities, not bigger cities.
Scale by making more cities, not bigger cities.
If you don't live in SFO or NYC you're doomed to a miserable existence of restless toil.
But... a significant percentage of professional jobs are in the NY Metro area, but not in the movie ideal NYC environment.