This USA Today story has the kind of numbers that stick with people:

Overall, federal workers earned an average salary of $67,691 in 2008 for occupations that exist in both government and the private sector, according to Bureau of Labor Statistics data. The average pay for the same mix of jobs in the private sector was $60,046 in 2008, the most recent data available. These salary figures do not include the value of health, pension and other benefits, which averaged $40,785 per federal employee in 2008 vs. $9,882 per private worker, according to the Bureau of Economic Analysis.