And there are some real natives with rent control housing.
I lived in Palo Alto for half a year before I even though about how the grocery store clerks could affor living there (which they don't). You also notice the lack of children after a while.
If you have been living in same place for years it's possible your rent is less than half as much as someone who moved into a similar unit this year.
The other case is that people not in high paying jobs don't live there and instead live far away and have 1 hour plus commutes.
Ultimately businesses have to relocate to find talent. Seattle, Austin, NYC and Boston are super well-positioned. Amazon HQ2 is important for this very reason. It is a gigantic churner of talent and can do wonders.