As a quick grammatical correction: Islam is the faith, Muslim is the adjective of things pertaining to it as well as the word for the practitioners.

As well, after the Second World War, but before 1965 the version of the United States presented in the Fallout Universe dissolved its 50 states and lumped them into 13 regions or "commonwealths" ([url=http://fallout.wikia.com/wiki/United_States]reading material[/url]). This was hoped to streamline legislation, but only ultimately resulted in each Commonwealth competing against and at the expense of others.

Vault Tech was also the body that really decided what to do with Vaults. Though it's very likely that a little balm greasing could do big things.