Who came w/ DBSS?? MBT right?
So he let them bid all they want. 
Broader view, whenever govt say build MRT, MBT release all e
nearby land immediately. You see Ten Mile Junction or this DBSS
(DTL at Tampines). Bid bid bid hor yi see. 
Not subsidised, he let them bid all they want.. Let you die.
Any case, private developer also see ppl want flat, they'll bid
also... So, consumer power comes in, too ex, dun buy.. Dun feed it,
next time you see who would bid DBSS at high price e next round.
It's like world cup TV rights.
MBT came from MINDEF, money wasting govt organisation. So
maybe tat's why profits at all cost.
He alrdy said, he only bothered monthly affordability, heck care
30 yrs or not. 
MBT, according to this Wiki thing seems to hang around SBS for
quite some years but never in MINDEF, but anyway, even if MBT
really hangs around SBS so long, yet can't do much for
transportation woes, then maybe that's already quite telling on his
abilities even in the earlier years.
http://en.wikipedia.org/wiki/Mah_Bow_Tan