 What about when robots and AI and result in mass-automation without creating enough new jobs?

Human desires are limitless. We can never have too much of something, so people would move into the remaining jobs and produce more of that. Workers would be paid less, but due to automation, everything would also be cheaper. This would work until the very last jobs are replaced. In a utopia where there is no need for labor, art, or science anymore, a market economy is no longer needed, but I doubt that day will come anytime soon.