For most of history there has been a large pent-up demand, and a demand whose fulfillment has almost always required labour. There are indications that both of these factors are changing; both the demand side where the demand pretty much only exist if it never has to be paid for (the pre-crash massive credit expansion, do people wan't macmansions, or do they want free macmansions?) and on the labour side where scaling demand simply doesn't create new jobs to any significant extent.
In the economic end game we have all resources extracted and recycled by self-servicing automated machinery, that can be turned into anything you can get a semi-ai blueprint creator to create for you for an automated manufacturing unit to produce. When there's no manual labour involved in the whole process at all, in a functioning competitive free market the price would fall to zero. And if you can get most things that you can reasonably well describe or copy produced for you at zero cost, what exactly do you foresee will be something you want so bad that you're going to foresake a lot of free time to try to find something someone else wants that they can't get for free that you can help them with?
There will be things, of course. But at the point where most things are free, a whole lot of people are going to say, meh, I'll go have a (no-human-labour-was-involved) beer with buddies or play an online (largely ai-generated) game or something.