The problem with that is that the same people would get all the loot and the average/below average players would have no incentive to enter the crucible. That leads to dwindling numbers in the crucible, which leads to less resources devoted to creating new pvp venues and pvp people who are unhappy and don't even understand why. There is no perfect system. The most important factor is involving as much of the destiny community in that aspect of the game, not just loot and k/d whores.