GS-13 starts out at $77,353 in DC area. And I would say the USG hires the same ratio of slackers as the private sector - it's just that they can't fire them...
BTW: Me, lived in Annandale from like three to five years old, came back a year ago - won't be stayin' long. Gotta keep searchin' for something left of beauty and grace in this world...
http://www.opm.gov/oca/06tables/pdf/DCB.pdf