Hello, I'm not that informed about UBI, but here is my arguement:
Everyone gets some sort of income, but wouldn't companies just subside the income by raising their prices? Also, do you believe capatilism can co-exist with UBI?
I'm a fan of UB I+S. Universal basic income AND universal basic services. Plus hight high taxes for the rich. And workplace democracy. And a massive shift of the economy to the nonprofit sector: if what your company multimillion corporation is providing is a utility, you can't have making a profit be your fiduciary responsibility.
Though i dont disagree in theory, beware of the utility part you mentioned. A plumber is providing a service and im not sure why he shouldnt make a small profit on top of his ubi in that world of yours. Can you elaborate?
I'm thinking more of the "commanding heights of the economy", rather than small time professionals. So, I'm talking Amazon, Google, Walmart, that stuff.