Paper claims Scots get a better deal on benefits and pensions.
The Scottish Government has dismissed claims pensions would cost more in an independent Scotland.
A paper published by the DWP says pensions would cost an additional £450 per working-age adult each year.
Today's publication claims benefit spending per head of the population was 2% higher than for Britain as a whole between 2012/13.
UK Work and Pensions Secretary Iain Duncan Smith says, at a time when the country's ageing population is increasing, Scottish Ministers must say how they'll fund welfare.
The Scottish Government maintains that welfare and pension spending would be 'more affordable' in Scotland.