The Gini index ranges from 0, which represents perfect equality, to 1, for absolute inequality.

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Sen Welfare is the combination of absolute livings standards and inequality, rising Sen Welfare means that inequality is falling as incomes rise.

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The sharp increase in this sort of household therefore reflects an increase in inequality, not in absolute poverty.

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Ms Toynbee, however, has focused on successive governments' failure to tackle inequality and pressed the notion of relative rather than absolute poverty which has grown, even under Labour.

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"We reject their claims about poverty in the UK", he said of his government's critics, arguing that absolute poverty had been abolished and that relative poverty was no more than inequality.

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