"The issues raised involve conflicting policy choices for Congress or PBGC to make. On one hand, imposing liability would likely disincentivize much-needed private investment in underperforming companies with unfunded pension liabilities. This chilling effect could, in turn, worsen the financial position of multiemployer pension plans. On the other hand, if the MPPAA does not impose liability and the Pension Fund becomes insolvent, then PBGC likely will pay some of the liability, and the pensioned workers (with 30 years of service) will receive a maximum of $12,870 annually. ... The district court held that there was an implied partnership-in-fact which constituted a control group. We reverse because we conclude the Luna test has not been met and we cannot conclude that Congress intended to impose liability in this scenario." [Sun Capital Partners III, LP v. New England Teamsters & Trucking Industry Pension Fund, Nos. 16-1376, 19-1002 (1st Cir. Nov. 22, 2019)]