As I understand, most large companies now are relying on a variety of contractors and the constractors try to vacuum up everything so they have the maximum to sell to different companies.

This is the way for companies these days to avoid legal responsibility for their actions - hire a contractor on a "don't ask, don't tell" basis.

Of course such things are extra-ironic in the context of US companies complaining about having their condensed by Chinese companies.

Edit: I read this in one article a while back. I can't links either corroborating or refuting it now and I think that's again because whatever the companies do, they want to keep it hush-hush.