So, you just validated the fact PHI chose that contract after the union  

... like you said, they offered somethign they believed would be marketable.   The UNION had little power to do anything, it was all PHI's choice.   The union deserves no credit since they weren't a factor anymore.   The decision was completely up to the company, who rewrote their final offer before imposing the green book.   There were a lot of strike marks in the final offer going the green book.   And, currently, the company has complete control of it still.   If they wish to change it, the can simply do so!