Duchess, you should know more about this.
Yes, the Warm Springs Prison is quite close to me and the program is very successful. The horses benefit, the prisoners benefit, and the future owners of a mustang benefit.
A good part of Nevada is owned by the Federal Government and the state. I can't remember the numbers any more, but I think private ownership of our land is at 5-8%. There are millions of acres in the middle of nowhere that could be home to these mustangs. And, there are probably mustangs living in those millions of acres that the government doesn't know about.
People move out here, buy five acres and romance about the wild horses. They call their friends to tell them they can see them out the window in the morning. Then they decide to feed them (which is against the law). Then after awhile they get tired of the manure left behind, or horses on the front lawn when they start landscaping, or horses crossing the highway when they want to get to work in a hurry. So now it's time for them to go - well, the idiots have built in the middle of their range, have made them dependent on provided feed, have overcome their natural distrust of man, and have filled up the highways with cars.
Meanwhile, some more people have moved in that now feel it incumbent on them to "save" the mustang. So they raise money, round them up, put them in holding areas, and perpetuate the problem because they can't stand the thought that nature is not a kind mistress.
There is no good solution any more, but every step we make to solve it makes things worse.