Ok now for the really difficult and controversial part. What is the upper bracket for expectations? Remember that any increase in real value of our contract is counter to the what the rest of American workers have realized and is clearly counter to our history over many contracts. We have being going backwards for some time. Any real increase will be a victory. Corporate America is clearly not used to increasing real compensation. At a 5.6% annually compounded, we’re approaching limits than can be justified to stockholders.

I disagree with your top compensation number and your bottom because: CEOs gained 18.9% in compensation from 2019 to 2020. The average worker can gain skills, education and knowledge and then move on to the next job that pays more on a yearly basis. Because of our skill set and our Union shop, we cannot. So basing our bottom number on inflation or comparing to other fields is flawed. That number should be higher. Additionally, the top number should be something like CEO increase and possibly better because they can make CEOs all day long, pilots take time and money.
https://www.epi.org/publication/ceo-pay-in-2020/