I beleived it include many MP and Ministers owning several properties across the island and abroad. Some even sat on the board of the property developers. High population mean high rental income yield. PAP will die and collapses, with all dirty laundry laid out to bare, if they didn't manage to reach certain population target. You think they care and concern about Sinkies being lunch stolen? They will bring in all sort of Tom Dick and Harry immigrants to drive the economy.To fill up vacant units in their investment properties.
Rent seeking economy is top priority for PAP cronies... they need rental income from ahnehs to pay their mortgages...