To the first main cause, it is well-known that the state of Wyoming does not collect personal income tax. Nor does it levy a corporate income tax. It also has one of the lowest sales tax rates in the country. In addition to its cultural and political aversion to taxes, Wyoming has not needed to collect such taxes because, more than any other state, it has long enjoyed record windfalls from oil, gas, and coal production. But these windfalls are fewer and far between in recent years, and point toward an uncertain future, and even potential crisis, for the state. Nevertheless, income tax is not being levied, even with skyrocketing population and income growth among the very wealthy here, almost all of whom are nonnative Wyomingites—some genuinely contributing to the community, but many others who have simply parked their personal money, or created a corporate shell, beneath this lucrative tax shelter.