If you take the 2010 total wages (6,009,831,055,912.11) and take only 5% of those wages (300,491,552,796) and then divide it by the 80% total number of working adults in the US ( 101,600,000*80%), you get that the average wage of those 80% is less than $3,000 per year.  This is only including those who work and the total wages.  I am sure the average annual wage of the working 80% is more than $3,000 per year.