People in boring, low paid jobs shouldn't be there. There are far better things people can be doing than working a till. The idea that we're doing people a favour by 'enabling' them to have a job when that job is tedious menial work a tiny compute can do is nonsense. We need to automate those jobs away to free people to do more interesting, fulfilling things.
We also need to do things to work out how to enable those people to do more interesting work, like figuring out how to pay people if the free market fails, but that's a separate issue.