But I don’t think the goal is “most people can be nudged” so much as “a nudge is a cheap way to increase a behavior by 5-10% which is probably quite significant

But I don’t think the goal is “most people can be nudged” so much as “a nudge is a cheap way to increase a behavior by 5-10% which is probably quite significant in policy circles. Low single digit percentage increase in people who pay their taxes would be huge.