The push for less ownership of one's primary residence, and less rent control (rent control is a policy that is much less popular now than it less was) also ser

The push for less ownership of one's primary residence, and less rent control (rent control is a policy that is much less popular now than it less was) also serves to heighten this separation. If one's residence is determined by market rents it's going to be very segregated by income level. Less stable neighborhoods and buildings where your neighbor who was there for two decades might be much lower income but "grandfathered" in by a lower sales price or lower rent back then. Being reminded that people in "lower class" jobs used to be able to afford what takes a high professional salary now would be a good reminder of the fragility of ANY labor, regardless of today's salary and comfort.