Once general AI exists, there will be ones for basically all economic activity everywhere. Unlike humans which require a generation to train, and which are kind of hard to reprogram (even using North Korean methods), with AI once you got the code you can just fork() off a new one, with the goals changed as desired (or not...).
https://medium.com/backchannel/ai-wont-exterminate-us-it-will-empower-us-5b7224735bf3
(Slashdot discussion: http://tech.slashdot.org/story/14/12/10/1719232/ai-expert-ai-wont-exterminate-us----it-will-empower-us)
Not sure what the local view of Oren Etzioni or the Allen Institute for AI is, but I'm curious what people think if his views on UFAI risk. As far as I can tell from this article, it basically boils down to "AGI won't happen, at least not any time soon." Is there (significant) reason to believe he's wrong, or is it simply too great a risk to leave to chance?