The top 5 per cent of income earners account for half the entire tax take - hence the controversial idea of introducing a goods and services tax (GST), in order to spread the burden beyond the rich and the middle classes.

• 整个税收的一半由收入最高的5%25的人缴纳，因此有人提出引入商品服务税(GST)，以便纳税负担不仅由富人和中产阶级来承担，而这个想法引起了争议。