You should be asking why the ordinary men and women in the streets, residents, activists and other oppositionists are raising such questions when the WP triumvirate are "soo quiet" and are not using the "platform" they have in Parliament to ask this (and other questions) especially when Lying Lim had bragged:
“But we are in Parliament, they [other oppositionists] are not. We will make use of the platform we have.” WP Chairman Sylvia Lim's declaration to Lianhe Zaobao on 06 May 2012
The triumvirate of Shameless Low, Lying Lim and Turbanless Tigress seem terrified of saying anything unless they are fondling and licking the PAP's testicles, or when they are making public declarations about the PAP's "competence", giving "credit" to the PAP, or declaring that they want to form a "coalition government" with the PAP:
"I think we have a competent Government... we need to allow time for the Government to work, and I hope, eventually, the policies will take effect on the ground, people's lives will be improved and we have a better Singapore." Low Thia Khiang in "By-election win not sign of trend for GE: Low", 147th Prostitute Press 28 January 2013
“You have to give credit where credit is due,” she said.“I think the PAP is very proactive in macro-economic issues
and finding niches to make Singapore globally relevant and competitive." WP Sylvia Lim, "Lim in Opposition
Praising Singapore's Economy Seeks Change", Bloomberg, 03 October 2012
"Perhaps I may have overreached myself by saying we need to get 44. It may be the case in the future that the PAP only wins 30 seats and they have to form a coalition government, and realise there is only a finite number of individual parties they want to work with. Let's not rule out the prospects of the PAP being forced into coalition politics. And coalition governments don't mean things don't happen... (there) could be unity government... There is a huge political space there for us to actually think about, insofar as how politics in Singapore... is going forward." "WP clarification comes one day after remarks at IPS forum on party renewal," 147th Prostitute Press, 10 July 2011
I will leave it to the WP gongkias and cultists like the one below to try to put two-and-two together and figure out why the triumvirate are behaving the way they do. Here's a clue for the WP gongkais and cultists:
Follow the money trail.