Just for the record here, here is what I could find on the US Tax incomes:

Year US Tax Income ($M) GDP ($B) Tax/GDP
2009 $1,398,542 (a) Not Available ---
2008 $1,602,823 (a) Not Available ---
2007 $1,571,322 (a) Not Available ---
2006 $1,478,945 (a) $11541.614 (b) 0.128140224
2005 $1,339,363 (c) $11163.759 (b) 0.119974200
2004 $ 998,328 (c) $10822.914 (b) 0.092242970
2003 $ 925,477 (c) $10466.951 (b) 0.088418967
2002 $1,006,389 (c) $10095.771 (b) 0.099684214
2001 $1,145,414 (c) $ 9910.034 (b) 0.115581238
2000 $1,211,749 (d) $ 9887.749 (b) 0.122550542
1999 $1,064,160 (d) $ 9671.089 (b) 0.110035178
1998 $1,017,274 (d) $ 9237.081 (b) 0.11012938

(a) source: http://www.fms.treas.gov/bulletin/b2009_4fd.doc
(b) source: http://forecasts.org/data/data/GDPC96.htm (c) source: http://fms.treas.gov/bulletin/b45.pdf
(d) source: http://fms.treas.gov/bulletin/b42.pdf
This, combined with historical information about Congress:

Year House Maj.(e) Senate Maj.(f)
2009 Democrat even
2008 Democrat even
2007 Republican Republican
2006 Republican Republican
2005 Republican Republican
2004 Republican Republican
2003 Republican Republican
2002 Republican even/Democrat
2001 Republican Democrat
2000 Republican Republican
1999 Republican Republican
1998 Republican Republican

(e) source: http://clerk.house.gov/art_history/house_history/index.html
(f) source: http://senate.gov/pagelayout/history/one_item_and_teasers/partydiv.htm

We also note that this is *not* spending, but simply tax income. Keep in mind we should expect that tax income should lag tax law by about a year for the tax law to take effect. The GDP steadily rises, so the main difference is the tax income (total dollars). As a nation, the US tends to hang out around 11%-12% Tax/GDP ratio. There were some low years (2002-2004) which seems to align (with said lag) with the Democratic control of the Senate, although it could also be blamed on the "Bush Tax Cuts" (2001, if I recall correctly).

Short answer, looking at a president, a congress, a party, etc. is potentially a myopic view.

You are probably right, it is "cheap". I am, however, sure it doesn't include expenses on the government outside of paying the contracted development group (contract cost). If it takes four government people (I don't really know), that is probably about $500K/year in salary, maybe another $20K in travel/year, etc. I don't know anything about the game, so I could be way off base here, but if it is run off of government servers, cost to set those up and maintain those would also not be included in the price.