Earlier quoted context omitted.
Your point about moving is really important: there are a ton of boomers sitting in houses which are much larger than they need without children living at home but in many cases they're doing exactly what the system incentivizes. Accessory dwelling units (ADUs) can help somewhat if they have enough space and want to get in the landlord business (or have family who need it) but really we need to make it easy for people…
On one hand I’m sympathetic to the individualist argument that it’s unfair for these people to have to vacate their 30+ year residences just because a bunch of people moved to their area. On the other, I agree that it’s ridiculous someone can be paying 10-20% what their neighbor pays in property taxes, and that this causes an inefficient allocation of resources. If we ever want to solve this we IMO need some kind of…
Where I live now has a couple of nice options for aging in place – dedicated 55+ apartment building, with government support for low-income; and a co-op where the units are smaller but they have more shared space. A lot of older neighbors have spoken glowingly the latter because it's all ages and it since they see their neighbors more they don't feel lonely the way someone in a detached suburban home might. I wish we'd build a lot more stuff like that where someone has an option which doesn't break the bank and avoids those other downsides.