Also, do not forget that ennui can be a powerful factor. Once you are rich enough to never ahve to work, or really do anything at all, what sense is there in life? Most of us work because they need the money, maybe because they have fun in their line of work, and because they have plans that they can work for. You don't need all this. If you feel like going on a trip around the world, you don't need to make plans for years to come, and work all those extra shifts. You simply call somebody, say: "Foster, I'll not be around for the next year, please watch my palace..." etc. And that is terrible.

By going on daring adventures, and encountering situations where your wealth isn't nearly as important as your personal skills. Also, he may feel the need to justify his wealth. He's not sitting on his behind all day counting shinies, but actually risking (un)life and limp. Maybe he himself needs that to enjoy his riches.