I had a simlar discussion, blackmail specifically, on another thread
Just because i will go down with you, does not mean blackmail is not am option.
If you have more to lose or if you care more than i do.....you can be potentially blackmailed. It is like sexual harrasment, based on victim's mindset .
In the case of your mc's staff. A secretary that is coverong up your misuse of drugs, use of experimental drugs or just abuse of patients, will still not be punished as severly. So for example: secretay's son owes gambling debts. Secretary wants you to take a client you don't want or to alter behavior of a client to her advantage
A few reasons, a trusted staff member might betray you. I look at the potential to abuse the pharma, since this is a game about control