What is there to debate? As the person you responded to explained, people don't want to pay $10 for a roll of toilet paper because people can buy one for $0.50. People don't pay a janitor or cook $200 per hour because people can buy one at $15 per hour.

If UBI existed and no one "had" to work, then people would probably have to pay a janitor or a cook $200 per hour.