One of the variant ideas I was stuck on was when the government and CDC decided (pre-Delta) to tell everyone that masks weren't required in stores if you were vaccinated.

Part of the justification was that they thought it would create incentive for the unvaccinated to get vaccinated, since the carrot was that they could stop wearing masks afterward.

Regardless of whether that had the desired effect or not, it seemed to be another example of being too clever by half, rather than just sticking with what the data itself suggested.