I think the negotiators on both sides of the table benefit.
Union can trumpet the “all in” number to their members.
Labor Relations types tell their bosses “We held the line here, here and here.”
BUT - they really aren’t that convoluted if you are able to get an updated copy of a contract (not an MOU!) and spend ten minutes looking at it and scratching out some basic math.
MEBADeckie did a nice job above.