Use Chatgpt. It will quote you the sources. This was part of what it mentioned.
The Workers' Party (WP) did propose reducing the number of Build-To-Order (BTO) flats during the COVID-19 period. In 2019, the WP released a working paper titled Counting Down to Zero: Are There Alternatives to VERS?, which recommended cutting back the annual BTO supply to 9,000 units, down from the 16,000 to 17,000 flats that were being built at the time.
I found it. Reasoning is sound. Can only mean actual family size is smaller than 3.3 or many ppl trying lunch to bto again to avoid lease decay? For the latter they will be adding to the market when they sell their existing place.
Calibrating the construction of new BTO estates
Resident population growth has been approximately 30,000 a year since 2010 and 2011. Assuming an
average household size of 3.3, this would mean that around 9,000 or so new dwelling units are
required annually. Completions within the same time period have far exceeded the resident population
growth. Private vacancies have only started to inch down, but there are still around 12,000 private units
completing up to 2022. Will the HDB have a vacancy rate problem, compounded by a still steady
stream of 16,000 to 17,000 BTO units in the last few years, which will continue to increase supply up
to 2022?
BTO projects should continue, but, rather than creating too many new towns, planners would do well
to consider, in future, partly meeting demand from new family formation by selling balance flats in
mature estates acquired under the Universal Sale and Lease Back scheme or USB (see previous
chapter). This would help advance urban renewal in the mature estates where many Singapore desire
to live, since these are nearer to the city centre.