1 Corinthians 9:6-8

9:6 Or do only Barnabas and I lack the right not to work? 9:7 Who ever serves in the army at his own expense? Who plants a vineyard and does not eat its fruit? Who tends a flock and does not consume its milk? 9:8 Am I saying these things only on the basis of common sense, or does the law not say this as well?