Some cite the example of Chile, where a universal voucher scheme that allows schools to charge top-up fees seems to have improved the education of the best-off most.

有人举智利为例，该国普及了允许学校收取附加学费的学券计划，但似乎只最大程度地提高了最富裕学生的教育水平。

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However, it is becoming increasingly clear that the nation is being softened up for top-up fees.

ECONOMIST: The battle-lines over university fees have been drawn

They worry that introducing top-up fees would scare off potential students from poor families.

ECONOMIST: The battle-lines over university fees have been drawn

The Conservatives say such top-up fees will act as a "severe deterrent" to poorer students.

BBC: Tuition fees a tax on learning say Tories