Theres is also an internal pride issue from maintining independence. They are able to field their own Olympic team and keep their own name in things like the Miss Universe Pagent. Also, because they are so poor and everything is government controlled, costs of living are dirt cheap. Becoming a state would force certain federal regulations upon their economy. Most don't want their power bills going from $10 to $80 overnight. They are also scared that the US is going to pass an english only bill for paperwork and whatnot. They are a hard blend of spanish and english that wouldn't want to tow the line. Also, they are able to maintain their own treaties with powers that normally don't deal with the US. If they become a state, they will have to follow our treaties.