let's not forget that Paul is talking about the "rights" of apostles and elders here. Nowhere is the formal office of pastor as we understand it to be today mentioned in any of this. Those who preach and teach...who are those? Preaching and teaching have been relegated to what happens on Sunday morning during a 1.5 hour "service"(which really is no "service" at all...except that the people that come to the show are "served" and entertained). To say that paul is advocating a professional clergy in its current form is a stretch in my mind. I do agree though that there are some that should recieve some support from the church to do what they do...However, even Paul refuses these "rights" so that the gospel may advance.
Isn't biblical new testament "preaching" usually intended for people that don't follow Jesus? When is that happening if what we call preaching happens inside the church building?
I think the things pastors spend most of their time doing are things they wouldn't have to be doing if we the church were really being the church. But if the church were really being the church it might put them out of a job...
I hope I don't sound combative...just putting some thoughts and questions out there...