Designing better choices through libertarian paternalism:

The libertarian aspect of the approach lies in the straightforward insistence that, in general, people should be free to do what they like. They should be permitted to opt out of arrangements they dislike, and even make a mess of their lives if they want to. The paternalistic aspect acknowledges that it is legitimate for choice architects to try to influence people’s behavior in order to make their lives longer, healthier and better.