Criticism of the Work Capability Assessment group of experts — a professor of psychiatry, a consultant psychiatrist in learning disability, a professor of rheumatology, and an expert in human resources — reviewed the WCA in 2013 and concluded that "the WCA produced consistent results on the whole, and is an accurate indicator of work capability compared with expert opinion". But in the year that the study was published, the firms running back-to-work training for 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
Incapacity Benefit disabilities to find suitable jobs, this reassessment programme was supposed to have saved seven billion pounds a year from the welfare budget by 2018. In practice, this major Whitehall project failed to generate any savings for the Exchequer. In 1995, the Conservative Secretary of State for Social Security, Peter Lilley, abolished Invalidity Benefit and replaced it with Incapacity Benefit after the Prime Minister of the day, John Major, had complained about the burgeoning caseload, saying: "Frankly, it beggars belief that so many more people have suddenly become invalids, especially at a time when the health of the population has improved".