Everyone's utility is different, some people become monks after all and voluntarily live in a cell. It's just that this question presupposes that the person is both young and has made over $800K. I'd maintain that the kind of person who fits that demographic isn't the kind of person happy to hole up in Thunder Bay in a 1 bedroom apartment and remain single with no kids for the rest of their life, although I'm sure there are exceptions.Maybe for you guys in the states, an income level below $100K a year is below the poverty line now?? In Canada, you can make a pretty comfortable life if you make $50K a year SINGLE, no kids.
That said, even assuming you can get two or three times the risk free rate without significantly more risk is naive at best.