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"You have to increase the spending side." Full stop. Right there. That is exactly what I'm talking about: adding to total spending.
If you want wealthy people to stop receiving government handouts and support, more power to you.
Market outcomes are a consequence of institutional settings.
The private financial sector is a lot more trouble than it is worth.
In the 70s, a bunch of dumb saving and loan "banks", with very tight regulation limiting what they were allowed to do, lower population, higher taxes, higher interest rates, and less technology, managed more housing starts than what is considered sustainable today with less regulation, an infinite number of things of banks are allowed to do, higher population, lower taxes, lower interest rates, and more technology. That number of housing starts in the early 70s is today considered completely unsustainable.
Here's the data from the U.S. Census Bureau to prove it: census.gov/construction/nrc/pdf/startsa...
The main driver for derivatives are modern U.S. "banks"; instead of taxing derivatives, maybe we should be looking at banning the main participants in the derivatives market, i.e. U.S. "banks." Why tax what you should outlaw?