MILWAUKEE, Wis. — Big Labor has helped a Milwaukee County Board member write a union-boosting minimum wage proposal that could cost taxpayers more than $27 million over the next six years.

The “living wage” ordinance also could bankrupt the county’s Department of Family Care, stunt job growth and hinder future development, according to a fiscal analysis by the county’s nonpartisan comptroller’s office.

County Supervisor David Bowen wrote the legislation in collaboration with the Service Employees International Union.