@hawkeye10,
But the disparity has become very extreme. Top CEO's are making over a 1,000 times what the average employee in the firm is making, and there is no justification for this. There is no arm's length transaction setting this type of compensation.
Many of the super-rich are heirs (e. g., the Wal-Mart heirs), and didn't make their extreme wealth.
The top 400 in income own more wealth than the bottom half of our population. The top 10 percent in income own 93 percent of the wealth, with the rest of the people fighting over the remaining seven (and deminishing) percent.
This extreme disparity stunts growth, and focuses too much power in the super-rich. Adverse consequences frequently occur -- did you read about France, Russia, Cuba, et al.?