2) Conservative budgeting->Fiscal hawks (of both Republican and Democratic Parties) control both the state legislature and have prominent seats in the Senate and the House, and a somewhat solid to moderate conservative Governor (s).
3) Great contribution to intake percentage. For every dollar we sent to the country, we pull in $1.25. This is much to do with our influence in the federal government.
4) Oil Boom.
Some can be duplicated elsewhere in the country, but we are an exceptionalist state. It would be next to impossible to sell the idea of a State-owned bank elsewhere. It will be difficult to argue for the incredibly conservative fiscal policies (with exception to agriculture) here to be exported to liberal states, especially those with different populations and demographics and social service policies that have been in place for a great deal of time.
You can't exactly plop North Dakota politics and its budget onto other states and call it good.