The issue is the trends over the past 30 years, which, if it continues, will most certainly destroy American society.
Here's an excerpt from the non-partisan CBO Report on income growth over the past 30 years:
The share of income going to higher-income households rose, while the share going to lower-income households fell.
The top fifth of the population saw a 10-percentage-point increase in their share of after-tax income.
Most of that growth went to the top 1 percent of the population.
All other groups saw their shares decline by 2 to 3 percentage points.
This can't continue indefinitely or eventually we'll all be serfs in the fields of the Lords and Ladies of America.
The question is: what should be done to ensure that Americans share more equally in the growth of the economy over the next 30 years?
Here's the whole report:
http://www.cbo.gov/doc.cfm?index=12485