From what I heard from an SL, although it might only be 60%
true... SMRT decided to stick with bendies for the time being as
their depots and the places their services mostly pass by are
anti-DD. As in their own infrastructure is not ready to support DDs
yet...
LTA should stop spending $$ on BSEP first(for SMRT), but rather
on the SMRT's depot if they(both LTA and SMRT) wants to
improve~~
Since they got money also, can go upgrade the interchange height
also(like Yishun Int and Bukit Batok).
At the end of the day, SMRT don't need to pay = no bus fare hike
= government and people benefits = 6.9m population friendly =
economy boost 
LIke that also benefitted bus community, don't need debate this
and that, or even rage over this issue just becus his idea wasn't
what everyone is thinking of...