Time to make a coal to gas plant on the reservation.
The Indians will always live under those conditions until we, and they, get serious and flush the goofy notions of "sovereign nations" and reservations. Businesses will never move into these places as long as they are going to be forced to deal with corrupt tribal governments.
They live in Gods Country for sure and their leaders and our laws hold them back generation after generation. You want a new car? Buy a refrigerator, washing machine, etc., and then we'll give you money for a new car -- but don't worry that you don't have electricity to run the refrigerator or washing machine -- just place it in your front yard and let it rust. Socialism at it's best.