Policing the industry became much harder, however, as gangsters invaded the garment district. Both the employers and the union had hired gangsters during the strikes of the 1920s. Some of them, such as Louis "Lepke" Buchalter, remained in the industry as labor racketeers who took over unions for the opportunities for raking off dues and extorting payoffs from employers with the threat of a strike. Some also became garment manufacturers themselves, driving away unions, other than those they controlled, by violence. While Dubinsky himself remained untouched by graft, a number of officers within the union were corrupted.