It&#x27;s in the public interest to have more population density and more units that will keep the pressure of competition high.<p>It makes sense to provide incentive for desired development.  Urban planning should balance office, housing, and retail space.  The city&#x2F;locality&#x2F;region&#x2F;nation should make those desires public, and if there is an imbalance incentive should be provided to correct it.   This might be a tax incentive, or it could be financing conditional on some most units always being beneath market median as well as only a limited spread in rent difference.<p>Planning might also want to focus on building a city at more than just a &#x2F;building&#x2F; level.  It makes sense to have parking at the edges and covered walkways, maybe with &#x27;people mover&#x27; belts (like at airports and theme parks) for major routes.  This would make for safer streets and more efficient pedestrian commutes.