[nivertech]

> these are human beings you're talking about.

I know, I was a contractor, and I think I'm mostly human being.

> there are non-hire agreements between vendor and the clients.

Large companies have a lot of leverage on agencies supplying contractors (I myself run one in the past). They dictate the margins and after which period they can hire the people supplied by the agencies. I think it's about the same cost as paying a headhunter.

As a rule usually the larger company dictates the contract terms to the smaller one.