a) The US is already prosperous. When you have much too lose, your mental trade-offs between gaining something and losing what you have become different.
b) US politics has been dominated by the massive post-war generation. It seems like we drastically stopped building when the boomers had bought their first homes.
Both of these also work for other Western countries that also stopped building.
However, while these are all issues, I think the root cause is a deeper cultural issue. I don't think Western, European countries have the same legal issues but they too stopped building.
There are two United States. A prosperous nation and a struggling nation. See both.
I’m from a now depressed rural town. When I periodically drive home it gets a little more ramshackle every year. My town had 20 operating dairy farms, now 0. Three industrial facilities, now one, which is now fully automated and employs security guards and guys to load trucks.
The best jobs are police, teachers and logistics people at a nearby distribution center.
I pay my entry engineers in real terms 15% less than I made 30 years ago. Housing is about 30% higher in real terms. Our benefit overhead grows 2x inflation.
Then travel abroad.
But the good news is that Musk reached $500 billion net worth, the Gini index be damned. /s