I can be as political as anybody on this site, but I am not sure I feel that this discussion really needs to be politicized to figure out what is going on.
People lease out their land for hunting based on what people will pay. Likewise, they sell it based on this same thing. It is their land, and they would be stupid to sell it for less, so it is hard to blame them for taking what they can get.
As for the Federal government giving land back to the states, many will say they had no right to take it in the first place. I am in that group. Now, the thing to do is to put pressure on the state to preserve it for public use instead of selling it off. This is a state level political issue that will require a lot of local input.
I readily understand the pain of increasing costs and lessened opportunities. Some years ago, I bought a small 65 acre property that cost in excess of $200,000. That was painful. In my area, there still is a lot of public access land, though. I really don't think it is as over hunted as it used to be, as fewer people are hunting, particularly in archery season (I think).
I may be all wrong, but I am certain the fault is not at the feet of individuals who sell their property on the open market.