When MPRA was passed last year, the Employers/Government/Pension Plans got most of what they wanted in the way of pension reform. One part was left out due to time restraints. A fundemental change in the multiemployer model, in their opinion, was needed to complete the bill. As we speak a bill is slowly winding its way through the halls of Congress to complete their "Grand Scheme". The link below will give you the info you will need on it.
https://www.smacna.org/docs/default...b1f0989c41746fcd88eaff000002c0f4.pdf?sfvrsn=2
https://www.smacna.org/docs/default...b1f0989c41746fcd88eaff000002c0f4.pdf?sfvrsn=2
A good idea about 50 years to late