"Grace & Mercy" (Tuesday! Question) Should We Be Charging For Ministry?

Ministry is defined as service to God and His creatures as we employ our spirit-given giftedness according to the instruction of scripture as good stewards of the manifold grace of God for the advancement of His Kingdom; that in all things God may be Glorified through Jesus Christ. What is your take on this? If this be the case why do pastor charge such outrages prices for doing work that they say was a gift from God? Don't we suppose to give our gift? Do we short change God when we charges for a gift that was given to us?