I asked this question in the Wisdom of the Crowd:
Is it fair for overseas Singaporeans to receive GST vouchers?
Here are the responses: (54 Votes)
35 % - The concept of giving GST vouchers to low income people is flawed and is implemented unfairly.
33 % - We should not give them the vouchers if they stay outside Singapore for more than half the year.
20 % - It is all right if they keep a Singapore address. We do not know how often they stay in Singapore.
11 % - On the whole, the GST vouchers helped the low income people.
See the pie chart at: