"It should my option to kill myself at work. "

I agree to a point and after many years of this I am in favor of the latter, restricting hours to a cap.

Why:

1. It provides more jobs. Yes a union is about employment.
2. It provides more opportunity for a larger majority of people. However, Jr. is always Jr., a fact which will never be fixed. The only thing a contract can do is make being Jr. more tolerable and equitable with the Sr.
3. It provides a greater level of safety, meaning it forces people to "not kill themselves" at a safety centered job like piloting. Of course there are always those who will burn the candle on their days off and come to work to rest (note they start that 8 day international all nighter tired).
4. No matter how they structure it the company will require a stable scheduling plan (work rules) for reliability. They can't have half the work force flying 100 hours one month and then they (the work force) turn it off and fly 75 the next. No way to staff for such events and thus many will be forced to work 100 hrs a month when they want to work 75.