Because they've leveraged their resources (mostly oil) extremely well and invested a lot of the returns back into civil society (as opposed to letting a bloated corporate oligarchy funnel off the proceeds).
I'd be a lot less opposed to fellow-Montanan Ryan Zinke's loosening up some of this nation's offshore drilling areas if the proceeds were earmarked for social programs benefiting the common weal—the very masses, indeed, who are taking on the preponderance of environmental risk when drilling commences.