Actually gahmen is trying to push the resale price higher. You can read from the news last year.
16,900 new flats expected in 2015
On average 30,000 couple get married every year and 80% of the market are hdb. If they reduce the BTO to 16,900.. those who can't get BTO will need to buy from resale.
Its not an attempt to push resale HDB prices higher, its more of a move to stabilise prices after flooding the market with a lot of supply in the last 3 years.
http://www.todayonline.com/business/property/enough-home-supply-2030
If there are only 26k marriages a year then property prices are going down hard because supply will outstrip demand by more than 100% in the next 3 years, this oversupply will take about 20 years to clear if the current BTO launch numbers and marriages remain roughly the same (16.9k/26k).



