Earlier quoted context omitted.
Robotic automation of any sort doesn't occur in a vacuum. If 50% of the jobs in a field are automated, in the near term you still have 100% of the former labor looking for that job, pushing salaries down towards their minimum, thereby reducing the cost effectiveness of further automation.
Though of course (without passing a value judgment on such policies) minimum wages set an artificial lower bound on the cost of human labor here, and this kind of low-skill work is inexpensive enough that hitting that bound is likely (vs., say, automating legal work), especially as minimum wages rise. For some industries getting to the point that near-100% automation is cheaper than $15/hour for humans is totally pla…
To me, minimum wage says "if you work, then you should at least able to support yourself on your income$." UBI+ says "if you work, you must find greater fulfillment than mere sustenance in your work."
Personally, I can't see minimum wage applying to anyone receiving UBI. Although it might make sense to have a "less than minimum wage" tax that helps fund the UBI directly.
$ Abstracting away actual amounts and whether or not they're enough
+ Market adjustments aside