Did the government floated a "test balloon" on the GST hike?

I asked this question in The Wisdom of the Crowd - Did the government floated a "test balloon" on the GST hike?

42% of these who voted said that they agreed with Sylvia Lim that the government did float a test balloon.

42% said that the PAP was not honest in disclosing the real reason for this decision to implement the GST hike in a few year's time.

15% said that the government did intend to hike GST earlier but were surprised by the unexpected surplus of $9.6 billion.

See the breakdown of the votes in
http://www.wisdomofthecrowd.sg/chart.aspx?ID=536