It's a lot more complex than just the numbers aren't there.
The "numbers", as generally understood, said they should have been raising a couple years ago. The reality is even more annoying than that: much of the persistent problems with the modern economies is... because of the Low Rates. When rates are too low, all sorts of negative consequences add up. (Watch for a complete collapse in a lot of Risk Assets over the next year, as we're at the end of a business cycle) You very quickly are trapped like the Japanese have been, the Europeans are and the Americans are trying to avoid.
The core of all of this is that everyone has too much Debt and the deleveraging process is painful, but it has been constantly pushed off. Because it would have ensured a different outcome in previous elections and would require "painful" cuts in social spending. Granted, no one has actually *done* austerity in their budgeting yet, they just complain about it.