Pretty much confirms the IAMNPF to be a Ponzi scheme, as it couldn't pay future actuarial retirement benefits claims on existing fund assets, even accounting for future expected investment returns. The union pension mismanages the fund, it goes bad (as with the IAMNPF) it demands more company money, and if the company wants to leave the pension, then the "withdrawal liability is based on its allocated share of the plan's unfunded vested benefits." $320 million???
Corporate CFO's see this type of nonsense, and I can understand as to why pensions have been eliminated over the decades. The corporations are on the financial hook for the promises and mismanagement of a 3rd party who has been exposed as corrupt and incompetent, even as the corporations have continued to make the required union employee payments to the fund.