1 Corinthians 9:16

For though I preach the gospel, I have nothing to glory of: for necessity is laid upon me; yea, woe is unto me, if I preach not the gospel! (KJV)

Then: Wright (p. 111) summarizes three reasons Paul accepts no pay: be an example for others; clarify difference between a travelling sophist philosopher and the apostles' higher call; and being set free by Christ, he was internally obligated to tell others the message of God's love. He had to do it as his response to what Christ had done for him. Paul's listing of reasons why he deserved pay and then his list as to why he didn't take pay were bound to get attention. The dichotomy would cause wonder and require consideration.

Now: Few find ways to serve the Lord and do it for free. At the same time, the need to support workers for Christ and the church itself becomes a slam against church attendance - "They always want money." Yet no one attends concerts, educational lectures, athletic events, or even some political rallies without expecting to pay first. Wright sees another problem in the mix-up between what the church sees and does - makes rules exceptions, makes exceptions rules. The problem comes in the mix of bringing in, then rooting out the cultural expectations of non-believers. First invited to hear the message for free, why should the hearing not continue to be free? (They need Paul's explanations.)