Every American worker should be able to save for retirement via payroll deductions.

There are cases when I can make myself better off by restricting my future choices and commit myself to a specific course of action.

"Save more tomorrow" is a nudge to help people do what they know they want to do, which is save more, but they can't bring themselves to save more now. Just like many of us are planning to go on diets next month, or maybe in two months, certainly not tonight.

The same with the mortgage brokers that were selling people mortgages they couldn't afford. We shouldn't pay them on each mortgage they write. They should have what they call "skin in the game," where they've got to reimburse us if the guy who sold the mortgage defaults.

Most people start claiming benefits within a year of when they become eligible, although benefits increase substantially if they wait.

One simple step firms can take is make sure that people that are getting paid a lot of money, say more than a million or two, that a big chunk of that money is deferred. That's going to change the whole ballgame.

Recall that people like to do what most people think it is right to do; recall too that people like to do what most people actually do.