Jobcentre staff who get the most people back into work will be rewarded with up to £250 in vouchers as part of a new scheme.
The pilot from the Department for Work and Pensions (DWP) will also see Universal Credit claimants asked to visit a Jobcentre every weekday for a fortnight once they have been on the benefit for 13 weeks.
The Public and Commercial Services (PCS) Union warned the scheme - first reported by the BBC - could increase the number of claimants being sanctioned.