I believe NASA directly employs 25,000 or so employees. I am not sure how many contract employees there are. Maybe that's the 300,000 number.
Still it's shocking the GSA has a budget of $26B -- that's insane. I like to see the government issue a breakdown of expenditures by these parasites.
I got the 300,000 number from this site.
http://wiki.answers.com/Q/How_many_employees_does_NASA_have
You are correct, that a bulk of them work for NASA as Gov’t contractors; however my point was “How many people does it take to complete the mission assigned, per Gov’t division?”. I am not aware of Gov’t Contractors assigned to the GSA - however, that could also prove interesting. Given the extremely limited scope of operations governed by the GSA, it seems wildly bloated “as-is”.
NASA has been gutted by the current administration, in fact we need to “hitch a ride” if we want to send anyone up to the International Space Station, compliments of Obama.