In 2029, with cash no longer accepted by major vendors including government, and with ubiqutous tracking of individual's physical movements and financial transa

In 2029, with cash no longer accepted by major vendors including government, and with ubiqutous tracking of individual's physical movements and financial transactions, so most people won't want the repurcussions of dealing with you even if they could, how are you going to be able to sell any of your food and use it to pay for land taxes?