The Libertarian Party in U.S. are really anti-government ideologues. They probably have about 1% popular support, including survivalists, and people who would like to rescind income tax laws, or an gun restrictions and such.
The Republican neoconservatives are better described as Classic Economic Liberals (the original definition of Liberalism, based on the economics of Adam Smith), which is not really anti-government. They promote Free Trade, deregulation, privatization.. they are staunchly pro military spending. They just don't want any restrictions or social responsibilities put on big business, their primary supporters.
The Free Trade lobby has strong connections to the Pax Americana. The imperial character of Globalism, backed by American military might, is much more an economic construct, than a fight against terrorism, which is why this World Police role is essential to preventing economic nationalism from taking root.
This is the whole irony of the whole thing. Though I'm more free-market oriented overall, though by no means dogmatically so, if the government insisted on spending billions of dollars, then I'd certainly rather it go towards social investments rather than military make-work jobs with no social or economic benefit to show for it. No wonder the US is broke.