In Auto Workers v. Scofield, 382 U.S. 205, 220, 86 S.Ct. 373, 382, 15 L.Ed.2d 272 (1965), the Court observed with reference to unfair labor practice proceedings that "we think the statutory pattern of the Labor Act does not dichotomize 'public' as opposed to 'private' interests. Rather, the two interblend in the intricate statutory scheme." The Court in Scofield allowed intervention by the charging party in part to prevent duplicate appeals. Id., at 222 n.20, 86 S.Ct. at 384 n.20.