The pattern of unenforcement [of immigration laws] and the factors supporting it suggest that public officials hold mixed motives that impair enforcement. A traditional solution to problems of agency capture, or even agency inefficiency, is to deputize private enforcers. Policymakers can change the unenforcement dynamic if they enable those most harmed by illegal employment to participate in enforcement. Congress has created an opportunity for deputization in recent amendments to [RICO], and courts should develop the doctrine to support its use.