WOTC - Oxfam study on inequality

I asked this question in the Wisdom of the Crowd:

So you agree with Singapore's ranking in the Oxfam study on inequality?

Here are the responses: (57 Votes)

53 % - The Oxfam study is generally reliable. 
35 % - The Oxfam study reflects the Gini coefficient.
7 % - The Oxfam study uses questionable indicators.
5 % - The Oxfam study is biased against Singapore.

See the pie chart at: 
http://www.wisdomofthecrowd.sg/chart.aspx?ID=938