Robots may be able to increase production to levels above human demand. Its not highly probable but it is possible.
such a system will be riddled with so much waste and inefficiency that it wont last long.The problem with your socialism with robots and UBI is it completely neglects the role of price
Price does more than just measure market value of a good or service..its also a feedback mechanism that controls production rates and consumption and it also signals scarcity and demand and lets people know when to look for alternatives and it also reduces waste.
Lets say for example you have a fish market..when its salmon season and supplies are plenty the sellers will slash the price..because they have too much and they dont want it to spoil...all the customers see 99 cent a pound salmon sales and realize there is plenty of it..so they buy it and freeze it .
At the same time the smart fishermen realize salmon prices have fallen and its not so profitable..so they focus their efforts on Shrimp or Tuna if they want to make a profit ...some of them may even take a short vacation since its not worth their time to go out and catch 99 cent salmon.
This diversion saves alot of waste because the fishermen who stop catching salmon arent bringing too much fish into the market that will rot and be thrown away
The opposite is also true...The sturgeon that makes caviar is rare..so the price of caviar is really high..so people kept catching them until there were very few left..then some resourceful fish farmer thought..hey why dont i build some ponds and grow sturgeon..and he made lots of money,soon others joined in and soon so many were farming that nobody bothered fishing for wild ones.
Whale oil used to be used in lamps,soap and cosmetics..untill the whales were hunted to near extinction...when whale oil became too expensive people started looking for substitutes like kerosene and vegetable oil
The point is if you disconnect price from the actual market you create a mess..waste and shortage are sure to follow