We have a few tribes out here. The responsible ones typically leave the res and do their own thing. Like @Slim-Whitey
said, they have SOO much opportunity and most of them let it go to waste. Something good that the tribes have done in more recent years, is they do not let you receive the tribal income unless you get your high school diploma or equivalent. Some of them can't even get their damn GED. It's pretty sad actually. Some of the tribal members get over $100k a month just because they got their high school diploma. Seems like most of them are still constantly broke and have complete shit credit even though they make more in a month than most Americans make in a year. Some of the other tribes are "only" getting like $10k-30k/ month with large year end bonuses. I had one recently come to be to buy a house. She made almost $30k a month. At the time, she just got her monthly paycheck and a $35k year end bonus 5 weeks ago. So within less than 60 days, she received almost $100k in income. Wanna guess how much she had left? Less than $1,500!!! I have no freakin clue how she spent that much money in such a short amount of time and had nothing to show for it. She owned a car, and rented a place with her boyfriend and in-laws.
From what I've experienced with reservations is there is a lot of wanna-be gangsters (and actual thugs), lots of trash, some high end houses that are completely trashed, lots of drunks and drug addicts, and broken down vehicles and buildings. Basically it's like a 3rd world country with constant residual income. Pretty sad actually. Some of them are doing really well though. They take the opportunity to invest their time and money, and do a lot to help their communities.