"Texas" is not the problem with the hunting of our feral hogs here. Any person, resident or non-resident, can hunt feral hogs here in our state without a hunting license all year long as long as that person is the owner of the land being hunted on or has permission from the landowner to hunt for hogs.
TPWD: Hunting Licenses and Permits
The problem lies within the landowners themselves. Since Texas has a huge feral hog problem (last estimate was 2 million or so) these landowners that own hundreds, if not thousands, of acres of land are trying to cash in on the "free open range" of hog hunting. These landowners are doing one of 2 things to allow hunting on their property. First being charging fees/leasing their land to hunters, or groups of hunters, on an annual basis and restricting the number of "leasees" they allow on their land. One landowner may only allow 4-5 leases a year limiting the number of people on their land to 5 at a time or so. In other words, they may allow 20-25 hunters a year on their land for hunting purposes. (Deer-Hogs-Pheasant-Quail-etc)
The second problem is all the guided hunting "Tours-Camps-Retreats-Etc" that have cropped up all over the state. These landowners are cashing in on supplying a full service guided tour for "Hog" hunting. They try to keep the tours down to a minimum of let's say, 10 people per month, at $500-$1,000 each month and only have 1 camp a month. Camp may only last 3-4 days each month. The landowners that have these camps do not want each and every hog killed (they may have a couple of hundred hogs nesting within the confines of their land) so that each camp can be a "successful" camp luring others in to camp with them in the future also.
So, these landowners, the same landowners that complain to the state about the 2 million hog problem tearing up their land when the state is at their front door are making a profit off their land out their back door.
On a couple of hunting boards I used to participate on a while back, there was a suggestion to these landowners saying "Hey, how about opening up your land for a small one time fee every 6 months or so for a free for all hog hunting spree." Not a single landowner came out and said "OK". Most that answered said that if the Hogs were thinned out, then their businesses would suffer. The "State" cannot force these landowners to allow free will hunting on their lands, and when these landowners themselves only allow a limited number of people to hunt their land, they will continue to have the self created problems with feral hogs they are currently dealing with.