Each year approximately 32,000 workers in the greater Twin Cities metro area are paid less than the minimum wage in their city. The losses average out to about $2,700 per worker. That’s according to a recent study from the Workplace Justice Lab at Rutgers University. But the researchers said the city of Minneapolis is doing something right. They described Minneapolis as the only city that directly investigates wage violations, instead of waiting for complaints to come in. Brian Walsh leads that work for the city and he joined MPR News host Cathy Wurzer to talk about it.