In an economy w/ chronic demand shortfalls, we'd want to spend that money, which is precisely what @ewarren actually proposes!

Second, as @Econ_Marshall points out, taxing wealth DOES NOT necessarily lead to fall in investment. https://twitter.com/Econ_Marshall/status/1194981538120830976
Lots of recent empirical work has shown this long-time Neoclassical assumption to be false.

If we tax the wealth, and use those funds to ya know, decarbonize the economy, pay for universal childcare, make college free, etc. the gov will be SPENDING that money.
We're just shuffling around the spending. But given that low- and middle-income households have a higher marginal propensity to consume, we'd actually expect to see an INCREASE in economic growth from redistribution.
Lot's of excellent work recently has documented how inequality inhibits growth. Mitigating inequality via a wealth tax would therefore expand economic growth in most scenarios, including those actually proposed by @ewarren
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