However, the “ideal policy mix” would turn into a lame duck in circumstances where fiscal policy cannot be activated in a timely fashion and with the expected impact on the macroeconomic situation. In other words, the co-ordination between monetary policy and fiscal policy can be compared to a walking man, who has to stand firm on both legs.
Should one of the legs fail to respond in a timely and coordinated way for whatever reason, many adverse consequences would inevitably follow.