We are not printing per se, though we enjoy calling QE "printing." For the most part, what we have been doing is borrowing at very low rates with most of the increase in money supply linked to debt. Consequently, the effects of QE are reversible to the extent the economy allows. When rates rise, as they eventually will, the net real interest on debt previously acquired at fixed low rates will go up or down depending on what the inflation rate does in response to rate increases. The Central banks job, among other things, is to maintain a more or less constant spread between yield on sovereign debt and the inflation rate, so that the net real rate remains more or less constant. In a global economy this is a difficult challenge because of exogenous factors over which individual Central banks have less control.
So far the handling of the financial crisis by the U.S. Treasury and the Fed has been masterful, considering the difficulties. Only in retrospect might have the response been better, and that's not helpful now. This, of course, does not exonerate the Fed for being asleep at the switch in the first place.
Considering the magnitude of the crisis, why would we not expect it to take many years -- it has been only eight -- to return debt markets and economies to more typical levels of rates and inflation. This must be especially so given the new challenges posed by increasing globalization and a world of fiat currencies. So far I don't see any signs that the dire predictions, first of hyperinflation and now of central banks losing control, are anywhere near coming to fruition. I just see very gradual return to somewhat higher rates and inflation. I don't see any signs of Central Banks losing control of the interest rate-inflation spread. But I do see very strong indications of a maturing U.S. economy and lower average rates of return on invested capital for the foreseeable future. Bubbles are the normal condition for markets. I have found an understanding of that reality to be very helpful.