A similar idea is that of "nudges" as developed by Richard Thaler and Cass Sunstein. Nudges are ways to create a framework of choice that is structured in a way to encourage people to make the "optimal" choice anyway. It requires a bit of psychology in understanding the flaws in people's decision-making and perception.

Some countries have high organ donor participation merely because they structure it as opting out rather than opting in. Instead of signing up as a donor, people have to sign a form to opt out. Is it better than rewarding people who do opt in, as in the incentivized altruistic plan?

At least in terms of a retirement savings plans doing the same thing, I think the automatic opt-in mechanism is better, but organ donations are trickier because they usually involve some emotional or religious conundrum over organ donation.