 Another important difference is although the NLRA allows private sector employees to engage in "concerted action," like workplace strikes, the Statute does not grant this right to federal employees.In fact, the Statute specifically excludes from the definition of "employee" those persons who engage in a workplace strike.It specifies that it is an unfair labor practice for labor unions to call or participate in a strike or a work stoppage that interferes with the operation of a federal agency.