This idea (that jobs are required to give a sense of purpose) and it's close cousin idea (that one's living must be "earned" and the proper way is with a job), are reasons why Basic Income, even if financially feasible, would never be politically feasible.

Our culture is so wrapped up in the idea of the necessity of jobs that I predict we will see government programs to pay 1/2 of the people to dig holes and the other 1/2 to fill them in, before we see Basic Income.