Hey Don Hutton..."naive"?
They are called taxes moron. We spend quite a bit of them in Iraq. The problem is humans don't know what is really important and what is not. So we spend lots of money on the wrong things and not enough on the right things.
Besides, if there were not all the infrastructures in the parks and access were limited...what would they cost? I guess there might be some trail maintenance..that will not cost too much.