Would you define the Federal Reserve as part of the government?
http://www.federalreserve.gov/faqs/about_14986.htm
As the nation's central bank, the Federal Reserve derives its authority from the Congress of the United States. It is considered an independent central bank because its monetary policy decisions do not have to be approved by the President or anyone else in the executive or legislative branches of government, it does not receive funding appropriated by the Congress, and the terms of the members of the Board of Governors span multiple presidential and congressional terms.
However, the Federal Reserve is subject to oversight by the Congress, which often reviews the Federal Reserve's activities and can alter its responsibilities by statute. Therefore, the Federal Reserve can be more accurately described as "independent within the government" rather than "independent of government."
Nationally chartered commercial banks are required to hold stock in the Federal Reserve Bank of their region; this entitles them to elect some of the members of the board of the regional Federal Reserve Bank. Thus the Federal Reserve system has both public and private aspects.[18][19][20][21] The U.S. Government receives all of the system's annual profits, after a statutory dividend of 6% on member banks' capital investment is paid, and an account surplus is maintained.
[0] http://en.wikipedia.org/wiki/Fourth_branch_of_government