Even if every possible task were automated and made super cheap, and somehow you were able to deny access to super cheap products and services to large numbers

Even if every possible task were automated and made super cheap, and somehow you were able to deny access to super cheap products and services to large numbers of people, these large groups of people would still be able to trade with each other. The robotic abundance/destitution scenario is inherently contradictory and assumes some things stay exactly constant while others undergo complete transformation. We have advanced societies that are making great use of technology today. And others that do not. Somehow these co-exist. A completely robotic United States will still have Amish people not benefiting from robots. Anyone else that cares to operate on the tech of 2014 will be free to do so. Or the tech of 2050 or 2100.