Eventually technology should kill pretty much all of the jobs. Human time and energy should be spent on what they find interesting, not on mundane stuff such as farming, housing, construction, database plumbing - all of which could be easily automated. No human should have to work to pay bills because there should be no bills. That should be the promise of technology. Only jobs left for humans should be things that require creativity, higher level reasoning and new ideas. Of course, there may be AI one day that does better than us on these areas as well and that's just part of evolution. It doesn't necessarily have to mean humans will go extinct. Universe has plenty of space for all of us and next generation of intellectual species.