Better known as what happens when government tells you what’s best for you:
Of all tyrannies a tyranny sincerely exercised for the good of its victims may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron’s cruelty may sometimes sleep, his cupidity may at some point be satiated; but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience.
Hence the downfall of most social engineering experiments, whether it is under the so-called “nanny state” or her modern cousin the avuncular state.