And he barely even began to cover the issues that are affecting the entire economy from the debilitating effects this degree of inequality has on the demand side of the economy.
For everyone who wants to argue that the capitalist economy corrects itself, remember that we do not have a pure capitalist economy. We have corporate welfare on a staggering level. The New Deal attempted to jump-start the economy by getting money into the pockets of people to make purchases. That was under Keynesian theory. Since then, the dominant theory has shifted to supply-side, which means that government goes straight to helping out business on the theory that the results will drive prices down and increase purchasing that way.
We've demonstrated, though, in the past roughly 30 years, that trickle-down doesn't. In a consumer economy, stability itself, let alone growth, requires a broad purchasing base. With that crippled, a downward spiral results.
**NOTE** The above is a simplified discussion of economic theory. If anyone reading this opts to nitpick my summary, I want it on the record that I'm aware this is putting everything in very basic terms that leave out a number of details. I primarily wanted to add that 'fairness' isn't the only issue involved with economic disparities.