Criticism of the Work Capability Assessment oversaw the study" and named the lead experts as a professor of psychiatry, a consultant psychiatrist in learning disability, a professor of rheumatology, and an expert in human resources. The review's conclusion was that "the WCA produced consistent results on the whole, and is an accurate indicator of work capability compared with expert opinion". But the following year the firm that had carried out millions of WCAs on behalf of the DWP since 2008 said it had come to the conclusion that "in its current form, the WCA is not working for claimants, for DWP or for Atos Healthcare". The
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".