(OOC: It's true that loot division can be tricky. I've seen one group that did some ridiculously horrible thing where they found an item that one of the characters wanted, but since the item was more than 1/6th of the total treasure (there were 6 PCs), they forced her to abandon it and sell it for half and then split the half amongst all 6, and then she couldn't afford to buy the item back from the store with her share
Anyways, I guess it's an interesting question as to who should pay. It usually doesn't matter because (a) healing is generally cheap and it doesn't matter (the exception being rezes) and (b) in non-LEW games, groups stay together, so the "Groups split the cost for rez" strategy is pretty much totally equitable for the party. But in LEW, the PCs are unlikely to adventure with each other again, so it's much less clear-cut.)