If I had never gone to college and decided to just work as a burger flipper the rest of my life and spend all my money on cigarettes and sky-diving (see, I can make up low-likelihood hypotheticals, too), then I'd be contributing even less. Are we going to start mandating that people actualize their full economic potential, as well?

No, I'm good with incentivizing that the old-fashioned way, by giving people who fail to do that crappier stuff than those who succeed.