I mentioned before that John McHale wrote a paper a few years summarising the behavioural economics solutions to pension underfunding.
The literature has progressed a lot even since then. The IFS in London are holding an event on June 15th to discuss, among other things, mass “opt-out” pension schemes being rolled out over the next five years in the UK where having a pension is the default position for new employees rather than not having a pension. Such pensions are designed based on simple psychological insights about how people make future decisions, the insights being mostly that we overweight current pain and have a tendency to procrastinate. This sounds pretty simple but incorporating these insights does make a big difference to policy design.
This literature is the most advanced, in my view, application of behavioural economics to real-world policy problems and it will be very interesting to see how this evolves. A link to their report is also available on the link below. I have constructed reading lists and so on for students and they are available below. They might be useful if people are interested in the general area of applying behavioural economics to policy.