The Fed's objective is to destroy the demand for cash

"Within the next several months, the Fed is likely to announce the tapering of QE. That's not a big surprise, but this time there is an interesting twist: in order to offset the risk that tapering might cause interest rates to move higher—which could slow the still-weak housing market and the still-weak economy—the Fed will also announce a lowering of the unemployment rate threshold that would prompt them to begin raising interest rates. By doing this the Fed would be removing some of the unwinding risk that continued tapering creates, while at the same time keeping bond yields from increasing, since a lower unemployment rate threshold would significantly extend the period during which the Fed would keep short-term interest at or near zero."