I found that once I got on the upper pay scale of the 737 at CAL, my line values dropped. I currently only get 80 hour lines, which is totally fine by me. When I was newer and getting paid less, my line values were consistently 87 hour lines.
I'm convinced that CAL's PBS has an economic code program written into it. The less you make in your category, the more you are going to work. It's cheap labor for the company. When I was helping run PBS at my previous company (Chautauqua), we opted to keep the economic code out of our PBS in order to make it more fluid and honor seniority better. Would have been a nice if someone at CAL would have actually done research on this concept of PBS before voting it in on the last contract.