Based upon what? Even Goof wouldn't have turned down a top flight D assistant for Thacker. He's going to say he's his man even if that's all that the budget would allow and of course, a bad coach will hire other ones. I'm referencing the Dabo model where Clemson ponied up the budget and surrounded him with really good assistants--we don't know whether Dabo was astute enough to make those hires or the AD did it for him.
Based upon how much the staff was paid during Collins tenure relative to the rest of the conference, all but Key were budget hires.