Based on the employers explaining this problem, they are asshole bosses. And in our 'normal' system of jobs and no UBI or other payouts, they can get away with treating people poorly. However, low skilled jobs don't have to be bad jobs, people enjoy all sorts of work and even find meaning in them. In this UBI / cash transfer role: employers can't get away with being an asshole(without spending big $$$) and have to connect meaning for the employee to the work they need done.