Further, it is much easier to keep track of the development of WS-10A than monitoring millions of officials for corruption. If even you and I know that they are installing WS-10A on J-11s, J-15s and J-16s, you don't think the govn't knows that as well? It is clear, even to amateurs like you and me, that SAC has no problem demonstrating to the entire world the effectiveness WS-10A. So how do you explain yourself, if you are the head of SAC, when the Beijing asks you why you haven't shipped WS-10A to CAC?
Plus, it is SAC that is dear to the heart of the CCP, not whoever heading SAC. They will not close down SAC just because of the sabotaging, but they WILL have absolutely no problem firing the head of SAC if they found something fishy going on at SAC.