I think the whole point of making them work for their benefits is to make them actually find a job that pays minimum wage or more. If you're doing a 30 hour week and earning £76 a week or what ever it is, you are going to want to find a job.
I know of loads of people that are just dossing around on job seakers and make no effort on interviews to get the job. Their are jobs everywhere but people just don't want them.