Work Capability Assessment people on ESA said they had "ongoing concerns about the accuracy of the WCA". And in 2014, Atos announced that it had come to the conclusion that "the WCA is not working for claimants, for DWP or for Atos Healthcare". In November 2016, the United Nations Committee on the Rights of Persons with Disabilities published its report on the situation facing disabled people in the United Kingdom. Of the WCA, it said: In 2015, Iain Duncan Smith complained that the system gave doctors a "binary choice", not an opportunity to deliver a more nuanced opinion on claimants' fitness for work.
Criticism of the Work Capability Assessment that it was "an accurate indicator of work capability compared with expert opinion". Conversely, Kent University academic Ben Geiger has made international comparisons of the test: he found “no transparent evidence that the WCA captures the demands of work in Britain today". In practice, experience has shown that the WCA usually identifies these types of claims correctly: However, the process has largely struggled to categorise claims correctly if they fall between these two extremes, particularly where mental health is concerned. In fiscal terms, the deployment of the WCA was expected to more than halve the sickness benefit bill over the