alot of people already have created jobs for themselves, like "exchange whore" and with art shops, lotterys, avatar contests, fishermen. i know a few people who make their money soley by going around and winning avatar contests.
charity people, bums, avatar edit sellers, marketplace shops, "merchants", poll/bumpers, or just good conversationalists. there are tons of ways to make gold on gaia already.
but a second mini-game to help people make money would be really cool. (other than fishing, obviously.)