Actually, the government does not need to depress prices; it only needs to set its new flat prices at actual cost subsidy. If resale prices still go up; then so be it, its market forces. But what the govt is doing now is jacking up prices; which is the opposite of what you are saying. We are just asking the govt to play fair
Besides, there is also a great possibility that when new flats prices are low, resale are low, private property will likewise drop

The gulf or divide may not be as big as imagined when everything falls to a more recognisable level. The lowest end private properties will definitely fall as no one wants to pay so much more, for just a little more. The lowest end privates are already just a tad above current resale. If new flat drop, resale drop, do you think the lowest end privates will stay there?