WOTC - Preserve value of HDB flat

I asked this question in the Wisdom of the Crowd:

How can the value of HDB flats be preserved?

Here are the responses: (58 Votes)

67 % - Allow expiry lease to be renewed at a nominal fee.
14 % - Allow CPF to be used for flats over 30 years old.
10 % - HDB to contribute to upgrading.
9 % - Allow foreigners to buy old HDB flats.

See the pie chart at: 
http://www.wisdomofthecrowd.sg/chart.aspx?ID=834