Additionally, you mentioned permits.
If the king or in our case the people decides it is illegal to kill lions at all, because they value Hashem’s creations and know beautiful and exotic animals face extinction, or because collectively we feel earning money is not a legitimate reason to kill these creatures, they can make killing them illegal.
Thats why you can’t get a permit and go kill whatever you want.
If the animals benefit the public or kingdom in anyway they certainly can make it illegal to kill them even for parnasa.