This is an interesting thought experiment. I think it's conceivable the cost of many things one needs would fall as a result of automation - but there are many

This is an interesting thought experiment. I think it's conceivable the cost of many things one needs would fall as a result of automation - but there are many things which have limited supply and that there would still be competition for, many of them consumable - so you would still need a source of income for these.