They have a very easy solution available to them, while keeping the medallions in. They already split coin intelligently (I think), so if a mob drops 1 silver and 20 copper 1 person will get 1 silver and the rest split the 20 copper. It should work just fine being totally random.
Now here's a crazy idea, just randomly dole out the medallions as soon as someone loots a corpse, if you're in the group, in range and have the space, you have a 1/6 chance to get any medallion. Over time, it'll be equitable. It will feel a little weird getting an item into your inventory without looting, but that'll pass.
Or they just go the other way and up the coin drop and make junk loot less valuable, I think everyone would be happy about this. Too happy.