Demand may be unlimited but humans will probably not be the most efficient suppliers of any goods in the future. Once it's cheaper to run a robotic AGI than to support a human the economy will change dramatically. Personally I think the long term solution is just to ensure everyone owns enough capital to sustain themselves directly (permanent retirement, essentially), but transitioning to that kind of situation and then keeping it sustainable for thousands (billions) of years sounds fairly difficult.

I attempted to clarify what I mean by editing the post. I meant unemployment and I apologize for being unclear. Also, I didn't want to say, "Do you agree with the Neo-Luddism?" because I think that you could still believe that structural unemployment caused by technology is a real risk, with out having the philosophy of opposing technology. Perhaps there are solutions that would minimize suffering, if technological unemployment is a significant risk, that does not involve halting progress in software and robotics.