Nonetheless, she remained a dedicated supporter of women's rights and woman suffrage. In 1912 O’Reilly founded the Wage Earners Suffrage League, the "industrial wing" of the Woman Suffrage Party, and had called for more fair wages which many upper-class women were not as likely to support. O’Reilly had an ‘equal pay for equal work’ plan for the movement after they had made a dent in their efforts. O'Reilly served as the president of the Wage Earner’s Suffrage League from 1911 to 1912. In this capacity she served as a volunteer investigator to the Triangle Shirtwaist Factory fire of 1911.