Large population + ageing population + increased robotisation = an awful lot of oldish people out of work for decades with no money. And it's not going to be fun. Fewer jobs and plenty of young people to do them.
Yeah but they can't get up in the morning and don't have basic skills to stack shelves, so we will probably be OK.
By that stage there will be no shops/shelves to stack, groceries(protein pills) will be ordered by your ' intelligent' fridge and delivered from a warehouse by a maglev vehicle......