Experience has shown that nudge is not the miracle cure for every political challenge. Some problems are just too big to be fixed by adjusting the “choice architecture”. Britain’s housing crisis is not solvable with a few tweaks to the tax system and the planning regime. That won’t be cracked without bolder and stronger measures. Not a gentle hand on the elbow, but a muscular kick up the arse. Nudge has some proved beneficial uses for governing, but it is not the answer to everything. Some things need the push and the shove.