PAP will only do things on their terms. The opposition has always been ridiculed and portrayed as incompetent in the govt-controlled media. It would not serve them to break this trend and lend credit to the very people they want to "fix".
If they appeared to accept or agree with the opposition's criticism of their own policy back then, people would start to question... could fuel alot of discontent. This is coz at that point in time, Chiam's words were still fresh in the public's mind. Basically, if Singapore citizens start to feel that someone in the opposition had some good ideas, then we might get interested in what the opposition has to say.. mght become a trend.. that's just not gonna "win votes".
Remember, the PAP is never wrong. The public should never doubt that. *claps of thunder*
