Assume that five employers are contributing to a mutiemployer plan. Employer A withdraws and it is determined that Employer' A's withdrawal liability is $1,000,000. Emplyer A is insolvent, no solvent controlled group members exist and no piercing of the corporate veil is possible. Who is on the hook for the $1,000,000? Would this amount be amortized and paid over time by the other four contributing employers? Thanks. Ed

That is exactly what happens. The liability does not go away. It is reallocated to the other contributing empoyers

You never want to be the last man standing.