https://theathletic.com/4230583/2023/02/20/mlb-salary-arbitration-cba-tension?source=user-shared-article
A really interesting article about arbitration. It's on the Athletic so it's behind a pay wall but I'll include a few interesting quotes
-The union is adamant that the current system should remain intact. “While we often disagree with individual hearing results, salary arbitration is a right that generations of players have fought for and defended despite MLB’s repeated attempts to eliminate it,” a union spokesperson said. “It empowers players who are under club control and their agents to negotiate a salary or, failing an agreement, to have an arbitration panel step in to determine that salary.”
"Both sides will use any argument they believe necessary to win a hearing, but the clubs’ approach to arbitration has become more confrontational in recent years. The system was designed to foster settlements, yet virtually all clubs now adhere to a strict file-and-trial strategy, refusing to negotiate one-year deals with arbitration-eligible players"
The article further states that owners would like to change the arbitration process to more fixed numbers based on performance, the union though doesn't seem to want to do that.
Considering everything that has happened with Burnes & Hader this seemed fairly relevant