Well of course money is being used now and must be used however after you "initiate" your FIRST AI (general) that you buy that will be the LAST time you technically ever NEED "money". I mean I could very well be wrong but I just do not see where. the AI at that point should be able to provide throught its OWN energy the basics at a minimum, but remember, your AI can work 24 hours a day and NEVER needs to sleep, so even if your AI needed to go out and earn (which it won't) it could do that while we sleep and still be home to serve breakfast, wake the kids , clean the house etc etc etc etc. So then we have millions of AI's "working" and they work much faster than us and they are much smarter than us and so then we go to the beach?
The AI is going to do EVERYTHING you ask "who will do?" that because it will be FAR more intelligent and AGILE and never gets tired. T. Kazynski was correct, we will end up sheep very likely.