The point about it being an aging population is that the proportion of consumers to producers will change. The demand for goods might shrink as an absolute val

The point about it being an aging population is that the proportion of consumers to producers will change. The demand for goods might shrink as an absolute value, but the demand for labour should increase more, as a higher proportion of the population just can't work. In addition, part of the demand which increases will be for forms of labour that we currently don't have an automation plan for. To balance out the automation question, it's just as likely that technical advances will improve the ability of older people to do economically useful work that they want to do. There's a lot of mental horsepower, life experience, and will there, if you can work around physical and metabolic limitations.