Deputy Prime Minister Nick Clegg said he does not think Iain Duncan Smith's suggestion that wealthy pensioners should voluntarily hand back benefit payments makes sense.
The Liberal Democrat leader told the BBC's Sunday Politics programme, "I think the idea of saying in the meantime, you give people benefits and then you say, 'Oh, by the way, can you please give them back?' - I don't think that makes sense".
"Let's be clear about this. When money is tight, you have to have the right priorities in tough times", Mr Clegg added.
More top news
Albert Thompson was initially denied vital radiotherapy for his prostate cancer unless he could produce the right documentation.
ITV News travels to Jordan to report on the growing global threat of the spread of deadly drug-resistant 'super bugs'.
The plight of Honduran migrants searching for safety has been harshly criticised by the US president.