"As the country becomes more unequal, there are fewer middle class customers. That means middle class bank products become unprofitable, and banks follow the money. And banking regulations make it worse because the capital requirements imposed after the banking crisis make it a lot more expensive for banks to do a startup small-business loan than go into wealth management. Startup loans are riskier than wealth management, of course, but the capital costs have become prohibitive, and banks don’t lose money on purpose."
Wait, what? I doubt this is the main or even a top-three cause of income and wealth inequality in the US.
Other factors strike me as potentially far more important causes of inequality, including increasing automation of labor, winner-take-all markets, concentration of corporate and market power, minimal antitrust regulation... to name a few.
The banking industry wants fewer regulations and lower capital requirements, as usual. This seems to be its latest rationalization for them.