Pay is determined by the complexity of the facility you're assigned to. At the end of my career, my experience in the field underscored the need for better support systems.
"It's one thing to lose track of one airplane because you can't communicate with them, but to lose track of all of the airplanes that you had communication with."
The controllers didn't just walk off the job; they were traumatized. Their equipment failed. It's written in the regulations that if they experience a traumatic event, they can take time off to go see a psychiatrist.
"Air traffic controllers at Newark Liberty felt traumatized following recent communication failures, highlighting the dire state of the US air traffic system and its staffing issues."