Pilots can't be trained overnight and not just anyone can be a pilot. You also can't just move a pilot from one aircraft type to another over night. So its like a resource that has to be carefully managed as you can't increase supply instantly on demand. Since you can't operate an airline without pilots its resource you can't do without. (Not yet any way). Its also an expensive resource to train and maintain. So basically pilots are a critical resource for an airline.
Especially when they block companies attempts to hire new ones. Why should exisiting workers dictate what new employees are paid? I don't tell my company what new colleagues should be paid and I work in a specialised professional role. The labour court and Flynn report clearly said that Aer Lingus were allowed to open bases outside Dublin and hire on local pay and conditions. Why didn't the pilots start throwing their toys out of their prams then?? The pilots in Belfast are going to be paid the same if not more than Dublin based pilots. Even the Union accept this. The problem is the pension scheme. The company don't want them to have access to a defined benefit scheme. Welcome to the real world. The existing pilots should thank their lucky stars that they have a defined benefit scheme and allow new prospective pilots decide for themselves if they are happy with the terms and conditions offered