Why did Charles Adair insist Mr. Numbers and Mr. Transport recruit Carl Fletcher to teach in the HCP?

At the start of Year Two, Numbers and Transport are in deep trouble due to aiding the Melbrook students in rescuing Mary and Hershel. It's indicated that they likely would have faced harsher repercussions if not for Charles Adair, who informs them he'll get them back in the company's good graces under the condition that he recruits Carl Fletcher to the HCP for at least one year.

But... why did Charles Adair do this? It seems he had to pull a few strings and in turn expend some internal capital to get himself this outcome. That this is something that would specifically benefit him. Now, we do know that Charles Adair is a key stakeholder in the company, and it's possible that he viewed Fletcher as someone he may have influence over through that connection.

However, that doesn't seem to track with what happens next. Fletcher, along with Numbers and Transport quickly become part of Dean Blaine's inner circle. One Sean Pendleton indicates they were brought in specifically because Dean Blaine needed people he could trust (even though again, it was Charles who requested he be hired). And said group almost immediately becomes involved in a conspiracy against Charles Adair to expose his secrets both in Intra's death and the Powered Cure.

So, this seems at best to have been a pretty serious miscalculation by Charles Adair about positioning more allies into the HCP, especially as we never seem him or Blake Hill follow up with any attempts to really court Fletcher. It just seems odd that Charles seemingly went so far out of his way to aid Dean Blaine.

I guess it's worth noting that this was prior to Globe's reemergence, which really put Shelby's situation on a timer of how much longer his secret could remain, but that also ignores that Charles never really believed Globe had died. So, I guess his motivation just confuses me somewhat the more I think about it.