I Corinthians 9:11 If we have sown unto you spiritual things, is it a great thing if we shall reap your carnal things?
I think that often people do not get why they should take care of the preacher, the Bible teacher. I think this verse explains what Paul thought and taught.
Paul said that he and Barnabas were giving them spiritual food and that it was only right that the hearers should take care of the food for the teachers.
If your spiritual needs are being met in many ways by your pastor then what would be strange about meeting his physical needs. That was and is God’s plan for the church!