Why does it matter?
Wealth concentrated at 1930s levels would mean AI's gains mostly land with people who already own things.
Direct quote
The wealth inequality forecasts under the rapid scenario describe a U.S. economy that would be substantially more unequal than today—but not unrecognizably so. The median economist forecast of 80.0% of national wealth held by the top 10% in 2050 would represent the highest concentration since the late 1930s, and yet that is a level the U.S. has reached before, albeit under very different technological and institutional conditions.
Forecasting Research Institute