> Unearned income is unfulfilling and the people who think they earned it resent it being taken from them

This seems like an easy explanation striped of nuance that really needs some data backing it. How is it different from resentment from people who earned it by working? Why is it unfulfilling - is it only because of comparison to others, or is it common even for UBI? Is it specific to feelings about income, but balanced out by easier life, or is it a significant decrease in satisfaction overall?