Everything that shortens hunter numbers will sooner or later lead to a spiraling effect. Game departments and habitat programs will no longer have the same level of funds.
The game departments will then usually jack up their license prices to level budgets. Consequently, even less people will buy licenses.
To give you a little idea: the german hunting education takes about six month and costs you about $2000, with this education you can buy an annual license for about $75-100. In order to hunt you need a piece of hunting land. All private land under 200 acres does not have the hunting rights with it. The land is put together in (mostly) small hunting leases by the jurisdictional administration.These leases are auctioned off in secret auction to the highest bidder. Hunters usually sell the meat, to be able to pay for the leases.The hunter is liable for crop damages if he doesn't fullfil the management plan.
Matter of fact: In some areas, there are not enough hunters anymore, which are willing to invest this much money and time to go hunting.
Wild boar populations explode in some areas, due to more corn beeing planted.In order to hunt pigs effectively, you need a good number of hunters to sourround a field, and even then the kill numbers are not high.
Historically, the development of the hunting was quite similar. A limitless hunting decimated populations, regulations were put in place, similar than they are today in th US. Then the trophy aspect took over, the opportunity to hunt was started to be limited by this system. The democratic way to limit opportunity is a lottery system. The undemocratic one is money. Money in the form of trophy fees, license fees and hunting lease fees.
Without equal opportunity, hunting will decline even more than it is today due to the effect of urbanisation. At the same time, game populations explode in urbanised areas. Now will the lease holders feel responsible to manage the population?