It is worth mentioning that an economy that produces higher added value will have a fallback on the lower classes too. While the delta in wealth between the rich and the poor has been increasing, in relative terms the poor have been getting richer. A poor today is way better than a poor 50 years ago or even 20 years ago. If you are concerned about what poor people can do, then think to all those products that now are too expensive but that a future richer society might want. For instance, in Germany (richer country than mine), is very normal to buy local/bio/laborIntensive goods like traditional food and so on, this is all stuff that non educated people can do and will do in the future.