What is the key reason for Singapore to have the lowest birth rate in the world?

I asked this question in The Wisdom of the Crowd - What is the key reason for Singapore to have the lowest birth rate in the world?

47% of the people who voted said that it is due to the bad social and economic policies of the government. 30% said that it is the need to work hard to make a living. 20% said that it is an incompetent government that does not know how to address the problem.

See the breakdown of the votes in
http://www.wisdomofthecrowd.sg/chart.aspx?ID=482