Stiglitz has mentioned a 2% wealth tax for over $50M and 3% over $1B. https://www.cnbc.com/2020/09/17/economists-stiglitz-and-pike...
Elizabeth Warren's proposal was 2% for over $50M and 6% for over $1B https://elizabethwarren.com/plans/ultra-millionaire-tax
Bernie Sanders had a proposal that started at 1% for values over $32M, 2% for $50M-$250M, 3% for $250M-$500M, 4 percent from $500M-$1B, 5% from $1B-$2.5B, 6% for $2.5B-$5B, 7% for $5B-$10B and 8% for >$10B. https://berniesanders.com/issues/tax-extreme-wealth/
Piketty suggested phasing in much earlier and more aggressively, at 5% beginning at 2M Euros. https://www.cnbc.com/2019/09/12/billionaires-should-be-taxed...
People should save their panicked pearl-clutching for when a real wealth tax proposal comes. 0.4% almost sounds like not a serious number.
Yes, California's bill is at a state level. But then, California is larger than many countries. Is it really so inappropriate for California to consider taking even small steps towards ... well at this rate not decreasing inequality, but marginally slowing its rate of increase?
To me, the crazy part of this isn't the idea of a wealth tax, nor the fact that it includes a prorated tax for part-time residents. (If anything, it's weird that ordinarily we expect that the first 89 days per year of your involvement in any state are "free" for income purposes, but not for consumption taxes.) To me the crazy part is that we're willing to begin this conversation without first getting rid of prop 13. If the motivation is to decrease actual economic equality, how on earth do we justify this policy that allows people to pretend that their most valuable assets are worth far less than their actual value?