I'm not sure where you guys are coming from, but the top officials of China acknowledges this is an issue. Are you saying that they are wrong and that China doesn't have a huge problem with corrupt officials? Or why else are you questioning these things?
In fairness accusations of corruption to remove political opponents or "troublemakers" have a long and storied history of application by genocidal dictatorships like China, democracies, and basically every form of government.
So merely having an accusation doesn't really say much.