i personally believe musicians should be paid because it's different than being an usher or a greeter or anything like that because our position takes skill and skill is something you have to pay for. thats like thinking that a pilot because he goes to your church will fly you for free anywhere.
i am not saying anyone should be up there they should fit the characteristics of a musician as listed in samuel 16:18
"Then answered one of the servants, and said, Behold, I have seen a son of Jesse the Bethlehemite, that is cunning in playing, and a mighty valiant man, and a man of war, and prudent in matters, and a comely person, and the LORD is with him."
im going to use drummer terms to get this across
cunning in playing - knowing when to keep the pocket, knowing how to set up transitions, and when to do those oh so sweet licks.
mighty and valiant man, a man of war - these two in my opinion basically mean that he/she isn't a punk and they are ready for war fare. when i say war fare im talking about war with the devil because that is what we are doing when we get up to play we are fiighting a war.
prudent in matters - he don't put his business out there also can be taken as he doesn't show you every trick he knows.
comely person - clean not with messy and wrinkled clothes, pants hangin to the floor etc...
last but not least - AND GOD IS WITH HIM that speaks for itself.