I don't think this is true. It's just much easier to bring in people when you have access to them to ask directly, basically.

In my short experience in public service, I met a great number of people who were not in lockstep with the so-called "values they try to force" (i.e. the political plans of the current government), so it seems they're not doing a great job of "forcing" those values if that's the plan.