Factory workers and UAW union members form a picket line outside the Ford Motor Co. Kentucky Truck Plant in Louisville, Kentucky.Luke Sharrett/Getty ImagesThe District of Columbia ranks best for workers, per Oxfam's new report.California, Oregon, and New York also have high wages and strong worker protections.Southern states have fewer worker-friendly laws despite becoming new economic hubs.If you want high wages — and a strong union — you might want to head to the nation's capital.The District of Columbia ranks higher than any state on a new index from Oxfam measuring which US states are best for workers.