A dozen States' Appellate Courts have issued opinions holding that Variable Separation Incentive (VSI) is a retirement benefit/pension. Subsequently, Massachusetts courts ruled VSI is not a retirement benefit/pension. Are States free to interpret federal laws however each prefers, or is Massachusetts incorrect? (Or are the dozen other states?)

Massachusetts altered a 1999 Judgment that had been final for 20 years. Does this violate U.S. Constitution Fourteenth Amendment Due Process?

Whether States can independently interpret federal laws regarding Variable Separation Incentive (VSI) as a retirement benefit, and whether Massachusetts violated due process by altering a 20-year-old final judgment