I'm also very suspicious that it would cost 40K per year to rent a reasonable place for 1 or 2 people anywhere in the US except maybe SF
......
EXAMPLE: 120k income breakdown:
Federal actual rate 16.5% (24% marginal)
CA State actual rate 6.4% (9.3% marginal)
Medicare rate 2.9%
OSDI rate 12.4 %
CA SDI rate 1.0%
= 39% right there
PS the highest marginal tax rate in the US is 50.3%.
Federal rate of 37% and California rate of 13.3%.
I still don't think there's an affordability crisis in general though. From what I've seen in this thread it's more of an inability to downsize. Everyone needs a car (sometimes 2), a big house, to live in the most expensive cities, to have kids, and they'd rather go into debt than compromise.
There might be a big step between poor and middle class though, as you come off benefits and have to pay higher taxes and health insurance. Child care also seems prohibitively expensive.