[JohnFen]

> Cities are out of room

I don't think cities are actually out of room. Maybe they are, but it's not obvious to me that this is the case.

> Being able to share that growth with towns that have plenty of room to expand seems like a huge win.

Not for the people who live in smaller towns because they prefer living in smaller towns.

> And preventing people with money from coming to your poor town is an excellent way to make sure the people who live there stay poor.

Not all small towns are poor. And regardless, a lot of people with money coming into a town very often causes prices for everything (especially housing) to increase, pricing poor people out of the area. And if you're poor, you probably can't afford to move elsewhere.

Not saying that these problems are inevitable, but there are certainly lots of examples of them happening. What I am saying is that this is a very complicated thing with no clear outcome for any particular place.