I am not sure how much Raila needs them. I believe he could definitely go over the heads of Weta and MDVD and secure western all by himself. In Eastern he might still need to rely on the tribal chieftains.
To fully consolidate Western, Babu would need a Western running mate. But that would really paint NASA /ODM as a regional outfit.
If he attempted to do this minus the page boys, he would lose anything up to 30% of his previous performance there, and all this may end up in Jubilee or elsewhere.
Let's just say if Jubilee remains intact, Babu can't afford to lose nothing from the Western, and that's probably why he clings to these sellouts