Imagine if China landed the first Moon Base in 2020 and was wellestablished there before the US even landed another astronaut. Highly unlikely BUT the fear is there - and with that fear comes the other one; strategic habitation of the Moon establishes something of a superiority over other countries.
Summary: the US govt. will guard NASA as long as it can. It can use it to make sure that it holds onto much of the tech (or at least controls who makes it).