The whole point of it being universal is that UBI gives incentive to work on top of it for more while providing a maintenance floor for those unable to work whi

The whole point of it being universal is that UBI gives incentive to work on top of it for more while providing a maintenance floor for those unable to work while still providing some demand for the products which are still needed. Things would be far more spartan with more of the population on UBI in a shutdown but they would be alive and their "self support" would be an outsized negative externality compared to what they generate.