I can't tell if you're being sarcastic, but the Fed has three mandates [1], one of which is to stabilize prices:
"maximum employment, stable prices, and moderate long-term interest rates."
Poster's statement is along the lines of "Given that the entire point of firefighters is to promote fires".
It's nonsense.
The problem with the FED, and every Keynesian economist is that they think the US will indefinitely be the world currency reserve, and that 5,000 years of gold based monetary policy is less stable than the post war economics that have given us rising inequality, lowering employment, indefinite QE, China calling for a de-Americanized world, and an interest rate ceiling of 1% (look it up, Bernanke said it!) that was the bottom rate of Greenspan.
I just love when current economists tell me I'm naive, and that government debt isn't the same a debt debt... Or that there isn't a borrowing limit. The limit, is when other governments stop buying your currency. See China-Australia trading deal, China's ease on buying bonds, and look up an interesting theory on how Japan will soon stop buying US bonds, due to it's self-inflicted inflationary policy, which will force it do invest in it's own money supply soon.
I'd recommend checking this video out: http://www.youtube.com/watch?v=BH9YPtk5VB4. This is what many people think. While some can definitely brush it off, many aren't.
If I recall correctly 40% of US currency is actually outside the country.
Check out this article on mobilization and money: http://neweconomicperspectives.org/2013/08/mobilization-and-... no other governments buying our bonds were needed. Nor are they needed now.
As for replacing the US dollar with something else as world currency reserve, Mike Norman gives his views: http://www.youtube.com/watch?v=m5fTV4bGO0w
The only time you don't want low interest rates is when an excessive amount of loans fuels demand-pull inflation. (Though, interestingly, high interest rates can also fuel inflation via wealth effects. Overall, I tend to think interest rates are the wrong lever, and fiscal policy should be used at all times, but that's a whole other can of issues.)
So the behavior is describe is exactly what is reasonable.
Now, the whole QE thing is obviously pushing on a string. The zero lower bound means it's not going to help economic activity. QE is like going to a witch doctor because all the people who could really help - in this case, the people in control of fiscal policy - can't get their heads out of their proverbial asses.