At the moment people who break the law do community service, so is it now a crime to be unemployed. For every 10-15 unemployed person who do the new community service, there must be a full time paid supervisors to make sure that tasks are being completed. Plus there would be an army of admin staff to track if the tasks were completed for payment or to cut benefits if jobs are not done.
With the possibility that thousand of council workers could lose their jobs. If a street cleaner lost his/her job and replaced by a community service unemployed person. Then if that street cleaner was on the dole for more than six months. He could be told to join the community servce scheme and clean the same streets he used to get paid for to clean.