QE is being done to save the banks, more specifically to prop up the shadow banking system which has contracted over $5 Trillion last time I looked.  The federal reserve's main function is to save the banks, it is not to improve the lives of the US citizen.  If they stop printing money then the banks would fail.  There is no way the US central bank can stop, it would be like a hospital refusing to treat any patients, it would eventually fail and be replaced by something else.