The Federal Reserve has responsibility for both interest rates and creation of money (check out the Wikipedia page). I believe the parent was referring to the

The Federal Reserve has responsibility for both interest rates and creation of money (check out the Wikipedia page). I believe the parent was referring to the Fed increasing M0, the base money supply. Interesting things have been happening to M0 over the past couple of years. Also, the Fed sets reserve requirements on the banks, which directly affects how much money they (the banks) can create (M1 and higher).