Evidence matters in politics: the question of whether a policy meets its stated goals is a matter of fact, and separate from the more subjective issue of what those goals should be, or whether the means are proportionate.
"Workfare" or "work experience" for people on JSA has been controversial. David Cameron has said that people on these schemes do well, with half of them off JSA in 12 weeks. Is that good? This question is explored in two good blogs from two good people, FullFact and Jonathan Portes from
NIESR.ac.uk http://fullfact.org/factchecks/benefits_work_experience_scheme_participant_outcomes-3340#overlay-context=node/3342 http://notthetreasuryview.blogspot.com/2012/02/work-experience-does-it-work.htmlBottom line: it turns out people leave JSA at roughly the same rate, whether they're doing workfare or not.
Graph via FullFact and Portes.
I would add one thing:
For all we know, the people who are even offered workfare might be systematically different to the people who aren't. For example, they might be the very people who the job centre think are least likely to get back to work. In this case, we should do a randomised trial. Job centres can identify people who they think should go on workfare, then we split that group in half as we go: half of them get workfare, half of them get "normal" treatment, and we compare how many people in each group come off workfare. Then we'd know for sure. Trials aren't hard and they give you the best evidence.