Recent months have seen a slew of headlines in union corruption cases all over the country. Labor bosses have been accused or pleaded guilty to embezzling union dues from hardworking rank-and-file members in Arizona, Connecticut, Massachusetts, Michigan, Rhode Island, and Virginia, just to name a few.

This criminal activity highlights the need for the U.S. Department of Labor to step up enforcement and increase financial transparency within unions via stronger disclosure. That is the only way to put a stop to the rampant thievery — and no, that’s not too strong of a word.