Coach D, this is what I've been trying to convey to you:
http://www.zerohedge.com/sites/default/files/images/user5/imageroot/2012/12/TSY%20market%20duration_0.gif"The chart shows, without a doubt, that the Fed is now the sole monopolist of Treasury demand expressed in mid-modified duration - i.e., the risk parameter most relevant to the Fed as it attempts to push everyone into higher risk assets (when instead all it is doing is merely allowing everyone to frontrun it). It also shows that in the past 3 years, the Private Sector has had its exposure to US Treasurys grow by virtually a non-existent amount, a simple fact that would make the head of steeped in theory and clueless of actual practice hollow pundits, such as Paul Krugman, explode.
To put it simply, the Fed's QE can not stop as there is no real market, or demand for TSYs expressed in duration terms, a fact the Fed's 4 year meddling in the market has been able to conceal quite effectively. Alas, the Fed knows this. The Fed also knows that in a country which will continue piling up $1 trillion + deficits forever, there will always have to be a backstop funder of the US deficit. Since China is long gone as a buyer of US paper, this only leaves the Fed.
In other words, the simplest reason why the Fed will never exit is because the US will never again run a budget surplus, meaningless discussions over what a token $80 billion a year tax increase (which will fund the US deficit for 2-3 weeks) will do notwithstanding, and the Fed will need to monetize ever more US-sourced paper until Bernanke and his successor after 2014 are the only "market" for bonds left standing."