Some people are desperate for work, certainly. However, you also have to do a certain amount of interviews to keep claiming JSA, even if you have no intention of taking the job. A Care Agency i worked at, ended up getting applicants to pay for their own CRB checks (as it was then) and refunding them after the applicant had worked for 6 months, as they were fed up paying for them for people who went for the interview and disappeared.