Cato at Liberty with the details:
And with much less volatility (which should make the case that government workers should be paid less).
In 2000, the average compensation (wages and benefits) of federal workers was 66 percent higher than the average compensation in the U.S. private sector. The new data show that average federal compensation is now more than double the average in the private sector.
In 2008, the average wage for 1.9 million federal civilian workers was $79,197, which compared to an average $49,935 for the nation’s 108 million private sector workers (measured in full-time equivalents). The figure shows that the federal pay advantage (the gap between the lines) is steadily increasing.
As the chart above indicates, the gap between the two should explode when 2009 figures are released.