Comment It was also nationalized (Score 1) 58
If you have something that is universally desirable and needs to be built at scale you generally need to do it with the government one way or another. This is why I transportation network is almost entirely paid for by the government. Even the little boxes of metal we putz around on the network with are mostly paid for by the government in the form of heavily subsidized gasoline and electricity.
It's not just a lack of outsourcing it's the fact that space travel, at least until very very recently, was a public good and a national utility.