Anthill. That is a great post. Some of the pilot body in our last EBA negotiations (medium - large EMS helicopter rescue company) wanted to introduce a seniority system similar to our competitors.
I for one am thankful that this was knocked back by the company for the reasons that you have put forward.
The end result in the EBA negotiations was a 25.5% or 27.5% (I can't remember) increase over three years and backpayed for one year (the EBA had expired for approx 12 months at this time.