I understand that by…

I understand that by shooting the wolves, the theory is it will help keep the moose population down. If you are truly concerned about the moose population perhaps you could cut back on the number of moose a hunter is allowed to kill. If these moose are used for human consumption, I would understand.
That said, I doubt that the majority of hunters are actually there for that one purpose. Instead they enjoy it as a "sport". I imagine if more game wardens were hired, the government would be able to better keep track of such things. Perhaps the hunters simply want to have the ability to get a hunting permit for wolves as well. Certain species of wolves are endangered. The WWF is exploring methods to strengthen the population of wolves in Europe because of their concerns of their population. Why on earth would you turn around and choose to allow hunting licences for wolf hunting?