I saw Shane Legg's talk recently and I understood the main idea but I had a question I wish I could ask him: He said general intelligence is 'as long as you pr

I saw Shane Legg's talk recently and I understood the main idea but I had a question I wish I could ask him: He said general intelligence is 'as long as you provide a goal, the intelligence should optimize over that goal based on experience'. But my problem is: general intelligence is supposed to come up with its own goals. Take for a example a couch potato who has some steady stream of monthly stipend, and sits in front of tv all day. This person is in possession of a functioning general intelligence yet has no goal. One day this person decides to assign to self a goal of going out and getting a degree and so on and so forth. That's also part of that person's general intelligence. It's not clear to me that AIXI is self-driven in that sense. It would be great if someone could comment on that.