Keiran Pedley, politics and media pollster for Comres, said the company believe George Osborne's personal standing "is the lowest it has ever been" as the Chancellor defended his benefit reforms today.
The pollster told ITV News: "On George Osborne's standing, we have recently found that over half of the public think that his economic plan isn't working.
"We've tracked trust in the economy with George Osborne and David Cameron over time and we are currently finding that they are at their lowest levels since the election.
"So Osborne's personal standing, in a wider sense, is the lowest it has ever been, which will raise questions over whether these benefit reforms are sellable to the British public."
The Chancellor earlier defended his new welfare changes and attacked the defenders of the "broken" benefit system.
George Osborne has accused the Government's welfare reform critics of talking "ill-informed rubbish."
Find out more about the raft of changes to the welfare benefits system that began to come into force from the 1 April.
The government has been forced to defend its changes to the benefits system after prominent church leaders claimed they were 'unjust'.