[undergrowth54]

But those productivity gains need to be directed efficiently, which requires some mechanism for the market to know the needs of a broad swath of the population. People get to vote on what problems need solving and that directs productivity growth as capitalists chase revenue.

However, if income is too highly concentrated, then folks with serious problems don't get many votes on what problems need solving and the folks who do get those votes are disconnected from those with more dire problems.