Again, you can't buy an average house here with that salary.
$400k after taxes is around $260k or around $21k/month. If you buy a median house in Cupertino or just about anywhere in Silicon Valley, the mortgage + property taxes is around $20,000/month.
You have $1k left over.
Hence, $400k is not rich here.
$400k is not enough to buy a house in Cupertino, not enough to start a family, not enough to enjoy an upper middle class lifestyle. But go ahead. Apply a blanket all rate to everyone.
Yes, I understand that $400k is a lot for many parts of the world/country.
400k is far more freedom than most people could ever dream of.
How are you going to get a $400k salary job in Detroit Michigan?
You may not be rich, but 400k is definitely high income. Hell, 100k is high income.
You must realize even the people I'm describing here are also actually in the top % of the world, and the extra taxes any government would ask of you would barely even help them. There's about 5-10 rungs below the poor people I'm describing that need desprate help. And the idea of someone losing 30k in taxes a year because they have to own a 2 million dollar home instead of a 3 million dollar home is so absurd to the person deciding between school books for their kid or an extra 1 lb of protein for a decent meal.
$400k is a lot, even in California. It would be nice to have more, and not have to make any sort of sacrifices at all on living location or anything at all. Get the big house, the nice car; all that. But people raise families on less than that in California. They just don't get to have the BMW and own that McMansion, and have to be picky about when to Doordash.