The Corrupt make the appointments. They pick the person with most baggage. Moi picked Mwau who was not qualified professionally and ethically. In any case the law establishing the body was so weak anybody could challenge it. It would be Nyachae who would cut a deal with Moi to fire Mwau and kill KACA
Then in came Ringera - one of the most corrupt judges in the country. He was sent home the first time along with KACA after the law setting up the organ was challenged by an "interested mwananchi". There are some issues there to consider. Whyy did the court entertain him when the existing practice was that a litigant had to show how he was personally affected or how he would suffer before being allowed. The judge later paid heavily for the ruling that the Moi government found hard to mourn.
So when Ringera came back in 2001, few were surprised because he had clearly shown The Corrupt that he was not interested in fighting corruption. Ringera saw it as a stepping stone to be Chief Justice or Attorney General and he had no intention of antagonizing the appointing authority. So between the time he was appointed 2001 and 2009, Ringera turned the body in to a certificate issuing agency. He would issue certificates and "clear" people of the label of corruption. He avoided any high level cases and routinely engaged the AG in fratricidal wars with each side accusing the other of failing to take action against The Corrupt.
When his contract came up for renewal in 2009 and with the PEV still in the memory, Parliament was in no mood to renew it. He was sent home along with his two directors.
P.L.O. Lumumba replaced Ringera. He left office still promising to take three ministers to court "next week". He was kicked out of office when he annoyed Orengo and the darling of MPs and facilitator of bribes - Cecily Mbarire. With Ngilu bringing in the Kamba voters. He is one person who unified all the factions in Parliament in one single effort to kick him out.
History aside:
The idea is to disrupt and mess the body so that no coherent policy and tradition is achieved.
Seems like they change managers like underwear. How can a body of such significance function with all these changes. The Matemu guy has not been there for even two years and they are already voted him out. Lumumba the same thing. Twenty years and the body is unable to function due to political interference.