My first thought was, "How does Cachelot specify "the culture" in his mind?". Looking back at your previous post I am assuming that this is ...
"he stacked the rest of the administration the exact same way.
If the administration=the culture my answer would be :
The *new* administration holds the responsibility and the power to begin with clearing out those untrustworthies that administer in his name,then engage honorable people to "do the hiring".
I certainly agree that the corruption must be cleared from the top down, rather than vice-versa. Question now is, are there men to do it?
Yes. But then, what exactly is happening when you change "the administration", as in last election? You change the very top. The layers under the top are untouched, and the top echelon has less power than you'd think to change the underlying structure. Now, what I would like to see happening would be akin to how I've seen some large corporations handle restructuring problems: everyone is basically fired and has to re-apply for their job. Or any other of the jobs.
What HAS been happening, on the other hand, is that there's been some new leaders hired and tasked with making changes happen. I believe that is the case with the FBI, for example. I also believe that they won't be able to accomplish very much, because of rules that protects the rank and file from being fired.
Oh, and your question about "the culture". Yes, I regard that as the administration. And as a cult worshiping at the Clinton altar. So far, I think that the administration hasn't changed very much from Clinton's time, regardless of new figure heads. Making that change will take a lot of time and a lot of ingenuity, I think. May even have to change a few laws and scratch a few EO's, I dunno.