I would say, if the party cleric chooses to not heal you for something other than his gods edicts then you stow it away and buy yourself some potions. Stockpile em, and at the moment when he needs your blade most, don't help him with it if it won't directly hurt the party. If you guys can later lug his body back and get his ressed or even go find a new cleric, then let him learn his lesson the hard way. Your skills are just as important as his (usually) and if he's gonna charge for his or give some esoteric excuse for why he is holding out, you should too. Hell, if your the rogue, charge him for disarming the trap you guys need to get past if he's already charged you for healing. Don't charge the group, just him. If he's made others pay in the group as well, this will teach him a lesson hopefully. I think if your gonna play an extreme cleric, warn the group ahead of time about the possible consequences and beliefs which may affect this.