Why does it make sense to force private industry to provide a UBI? A minimum wage job puts a floor on what can be paid and this fundementally distorts the labor market. If a job does not provide enough value to the employer to meet minimum wage it will not exist for very long. This rules out many types of work where the value is hard to capture and pushes all of that work into the domain of either being funded by government or non-profits. This also potentially prevents labor participation by certain categories of handicapped individuals who have the potential to provide value to society and experience satisfaction in their work but can't compete in a marketplace distorted by a minimum wage.

If anything, a UBI enables low-wage work, especially when that work provides satisfaction to the employed. It also can increase economic productivity because the labor market will be able to distribute labor more efficiently.