The other reason maybe, Koh Tsu Koon as the KPI minister is underperforming and Najib needs a strong figure like Idris to get things going. If this is the reason to go by, wouldn't KTK be receiving a slap on his face? It could probably be a 'constructive dismissal' for KTK too, knowing that one department cannot have two managers so one has to go, and Najib is doing it in a not so subtle manner. I wonder how is the reporting line for these two guys be on the organisation chart? The way I see it, two boxes side by side with a line between them with each end, an arrow head.
Idris Jala is a corporate head and is being driven by KPIs both in Sarawak Shell and MAS. KTK is a politician and may not know the mechanism in devising the various KPIs for the government. It has already been more than a year since KTK assumed the post of KPI minister and todate, he may be falling way behind. With KTK facing such a dillema, Gerakan representation in the government is as good as over.