But why does everyone want to move to dense urban areas? You assume that there’s some small, easy-to-offset group of factors, like public transit or “jobs programs,” and that if the government just did something with these things, it would equilibrate population dynamics appropriately.
I’m not convinced. I think people are more driven by status symbols and glamor. Living in a city is considered relatively more “high status” and a “glamorous” lifestyle. Even poor people in cities are glamorized as having greater access to sex, subculture groups, participation in civic functions like meaningfully large protests, proximity to celebrities or wealthy people.
I think it’s plausible to argue that as developed societies progress, competition between people becomes increasingly focused on intangible social status, and one side effect is that people become more and more willing to sacrifice material comforts to crowd into cities for the chance to possibly compete for higher social status.
It wouldn’t matter if you incentivized people with cheaper housing, “jobs programs,” or anything else, “Ruralness” itself would be such a direct negative thing, in terms of social convention, that people would pay to avoid it, in the form of impossible rents, overcrowded infrastructure, etc.
I conjecture you’d need a generational propaganda campaign to glamorize rural living, combined with some huge changes in how employment is structured, before anything could even start to incentivize meaningful redistribution of population to rural areas.
The jobs programs thing is especially tricky, because there is a chicken and egg problem with modern employment and rural areas. It’s not just a matter of retraining people, because they’ll still want to move to cities independently of jobs, and then employers will want to be located in cities to have high-status clans of employees and to be colocated with other high-status people.
Jobs training doesn’t really solve anything unless you change the underlying culture such that employers can participate in some virtue signalling by locating there.
It’s why you might see start-ups in Grand Rapids, MI, but you don’t see Google opening a new 500-engineer research lab there. The people who want those engineering jobs want a life with status signalling only found in big urban centers associated with cultural progressiveness.
I’m not saying any of this to argue one way is better or is right. Only that I think any theory about why people accumulate in dense cities has to be primarily based on social status effects that exist by convention and not by any material factor.