Here is a case from Nairobi where a chief officer was banking an equivalent of Ksh. 631,720 every day into his personal account for 6 years straight!!!
https://www.nation.co.ke...00786-vf8jih/index.html
I think that while admittedly some governors may be thieves there could also be others who are victims of thieving professionals.
How many Governors understand budgets and accounts and how money flows? How many scrutinize what they sign?
Most CEOs will tell you that the bulk of a CEOs job is actually quite boring. It involves a lot of reading and checking and asking questions and following progress. A maverick governor may find himself quite incompetent at the task. And since with his loud mouth he has made himself the face of the county a smart thieving accountant can actually manipulate figures while knowing that the spotlight will be on the Governor.