That isn't a reservation exclusive problem. For example, since the introduction of meth, you'll see a lot of problems everywhere in rural areas (beats blowing up an apartment building). Plus smuggling has always been a rural problem. Its just a lot more direct for the feds to intervene on a reservation.

It kills me to think people want US government healthcare after seeing what the government provides on reservations. I guess they figure since they would be serving "white folks" then it would be better. That also leaves a bad taste in my mouth (which had 3 operations because of a botched root canal).