People living on Indian Reservations are not allowed to own land. The US government mandates that the land be communal. Of course, nobody is going to invest in a property that they do not own, so they all live in trailers. They also have a pitiful education system, high crime rates, and poor health care. There is zero economic development because a business cannot enforce a contract on tribal land. Simply eliminating the Bureau of Indian Affairs would do wonders for the Indian Nations, as it would allow them to actually control the land they occupy. Taking it a step further and eliminating the reservations completely would be much better.