. . . "Fight for $15 protesters call for higher minimum wage, higher salaries for adjunct professors By Annie Bryan and Gabrielle Ioro Apr 16, 2015, 12:08 AM 1 While the national Fight for $15 campaign focuses on raising the federal minimum wage, the 300 students and professors from Columbia and other universities who gathered on Low Plaza on Wednesday also demanded an increase in the minimum wage and sa" . .