An economist says benefit sanctions aren't working. 

The traffic light system was introduced last year and beneficiaries who failed obligations like taking part in Work and Income assessments. 

Infometrics principal consultant Rob Heyes says the number of beneficiaries has continued to rise after they were introduced. 

He told Heather du Plessis-Allan that it's goal of getting people into work hasn't come to fruition, and says the job market has been tough with vacancies drying-up. 

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