Ignoring for the moment whether it is true or not,

given recent DWP form on "statistics" but just assuming it is true, what was it that the Job Centre staff told these people?   Was it "if you get a job the cap simply won't apply to you at all, but if you don't get a job, it will?"

"The Department of Work and Pensions (DWP) said that 12,000 claimants have found jobs over the last year, after being contacted by job centres.

The job centres warned them they might have their benefits capped if they did not find employment".

Benefit cap 'encourages job seekers'
More than 12,000 people have moved into work after being told about the benefits cap, the government says.

And just a little aside, because it bears being brought to everyone's attention, Labour having previously given the impression that "the cap" was desperately unfair, today their shadow Work and Pensions Secretary Liam Byrne was at pains to make clear that what is wrong with the cap is that it simply isn’t tough enough ...

"Liam Byrne MP, Labour's Shadow Work and Pensions Secretary, responding to the benefit cap roll out today, said:

The benefit cap is a good idea in principle but its already fallen apart in practice. Ministers have bodged the rules so the cap won't affect Britain's 4,000 largest families and it does nothing to stop people living a life on welfare. The Government needs to go back to the drawing board, design a cap without holes and put a two year limit on the time you can spend on the dole, like Labour's compulsory jobs guarantee".