WOTC - Enough savings for retirement

I asked this question in the Wisdom of the Crowd:

What is the best way to ensure the citizens have enough savings for retirement?

Here are the responses: (34 Votes)

53 % - Give them attractive options to invest their savings in CPF voluntarily.
24 % - Make it compulsory for them to buy the CPF life annuity.
21 % - Let them manage their own savings.
3 % - Delay the withdrawal age to 70 years.

See the pie chart at: 
http://www.wisdomofthecrowd.sg/chart.aspx?ID=1224