This is a very insightful comment. It's also important to understand the reason you can't have both, in the US, is political. Infrastructure spending in the US

This is a very insightful comment. It's also important to understand the reason you can't have both, in the US, is political. Infrastructure spending in the US is currently below depreciation (http://blogs.wsj.com/washwire/2015/03/10/spending-on-our-crumbling-infrastructure/ http://blogs.wsj.com/washwire/2015/03/10/spending-on-our-cru...) so we aren't building mass transit at a rate that meets growing demand. Rich, mobile people buy up property in cities and along transit lines. If we invested in transit we could make a lot of underused housing useful.