So private land owners and goverment is limiting the ability to reduce the hog population effectively?
Yep, especially the government. There are lots of folks out there who are ready to hunt wild hogs but they are frustrated by the lack of a place to hunt. Can't hog hunt in the WMAs because the bureaucrats say so. Most of the farmland is leased out to hunters. Some of the owners do not allow hunting. There are those hog hunting ranches like the one at Pauls Valley but they cost big bucks.
i'm pretty lucky to own three parcels of marginal land: All have hogs: Boy, does one of those places have hogs. Problem is that all three places are some distance from our home. We do have permission to hunt several other properties.