1 Corinthians 9:6-8

Or is it only myself and Barnabas who do not have the authority to act in this way? Who has ever served as a soldier and paid his own stipend? Who plants a vineyard and does not eat from its produce? Who pastures a flock and does not drink from the milk of the flock? Am I saying these things according to man? Or does the law not also say these things?