Being able to participate in the society financially is the ultimate necessity for people. You can be searched for by law enforcement and banned from "the Internet", as long as you can trade with random people for your food, you can live. The authorities can ban the Jews(or other group) from buying things, but then can not control everyone to enforce that. With digital money they can, and they even can apply that to a single person. Modern communist dictatorships use that as a threat instead of prison, because it is far more effective. Banning you from trading is a death sentence and being able to work, but just not being allowed to is a great way of mental torture.