RBA: Low Interest Rates Imprudent

The Reserve Bank of Australia (RBA), whose short term rate of 3.25% is the highest among significant advanced economies, now says that the current low interest rates are "imprudent", in one of the most unequivocal signals yet that the RBA plans to implement more rate hikes.

Just how imprudent then are the zero (or near zero) interest rates in many other economies?