The Jetsons had a solution
I hadn't thought about the Jetsons since I was a kid, but I heard yesterday that it was coming to the big screen, and they had a link for the title sequence which I hadn't seen in forever. At the end, George sits down at his desk and puts his feet up.
I haven't seen it since I was a kid, but I remember the joke was that all he did was push a button. Not sure if it was just on/off or a little more involved, but basically he had a really cushy job where he did almost nothing but had a big office with his own desk and made enough money to buy the flying car, house in the sky, and robot maid which is all anyone could ask for in the 22nd century I guess.
Maybe instead of worrying about people being replaced, we just need a law that people need to push buttons to turn these AIs on - and off. That will not only keep them gainfully employed, but also help prevent the rise of Skynet, thanks to the 'off' button!