You'll never get the prices of food, warmth and shelter down to zero, even if these commodities are no longer scarce.
The present system requires you to have active hands in the creation of these commodities or you don't get a share. In the face of increasing efficiencies, offshoring, etc. people's offer of labor may not find a buyer, making them unemployable. That's where UBI comes in, to assure that post-scarcity is enjoyed by all, not just those that have marketable labor.
Where this gets complicated is the moralizing. But it's not the moral thing to let your neighbor starve when you've got surplus food, even if there's some game theory that you will generate free riders, or some of these people aren't "deserving", or working folks divert a little bit more of the fruits of their labor than they already do, or other societies that are a race to the bottom of human welfare will out-compete us.
The present system requires you to have active hands in the creation of these commodities or you don't get a share. In the face of increasing efficiencies, offshoring, etc. people's offer of labor may not find a buyer, making them unemployable. That's where UBI comes in, to assure that post-scarcity is enjoyed by all, not just those that have marketable labor.
Where this gets complicated is the moralizing. But it's not the moral thing to let your neighbor starve when you've got surplus food, even if there's some game theory that you will generate free riders, or some of these people aren't "deserving", or working folks divert a little bit more of the fruits of their labor than they already do, or other societies that are a race to the bottom of human welfare will out-compete us.