PAP can dangle the upgrading carrot for only so long, sooner or later, there will reach a point where the residents feel that their estate already looks nice, and that they have all the facilities they can ask for. PAP will not be able to use it as a way to get the votes anymore.
And at a time when the Opposition kbkb about PAP using esate upgrading, Chiam See Tong went ahead, and use it too. If he is so outraged over it, then why is he using it too? An eye for an eye? More like because if u can;'t beat them, join them.