america has an interest in making fracking viable, since it's a technology that not many nations can employ (without the involvement of american firms anyway).

Fracking also allows america to place economic pressure to some countries like Russian (by lowering the price of their primary export).

Given the above, it will be unlikely for interest rates to grow in the next decade - since doing so has no advantages (except inflation, which is kept under control by the dollar's reserve status), and has many dis-advantages (such as causing a shock to businesses borrowing, which can precipitate a depression).