What goes around come around - or don't get mad get even.
There is a silver lining in every dark cloud.
Unions in general, ACPA is a good example, have a long history of screwing new members to the benefit of older, or rather more senior members.
The current entry level salaries at AC being Exhibit A. 40 K a year to fly a jet. That is a royal screwing.
The newbies have always put up with this on the grounds of well I'll get the brass ring someday, plus the lack of numbers to really change it.
(There might be an interesting age discrimination case there if you think about it)
Take away the incredible incentives to being at the top part of the list and suddenly the entire game changes.
A way out of this is to create a contract with salaries based on years of service, (years of service, not age so this gets around discrimination charges) not seniority based equipment bids. Likewise a fair bid line on schedules etc. Flatten the salary at 20 years service and don't load the pension to final years of service. Make everyone fly their share of holidays and weekends and lots of people will bail and open up slots.
If the young ones are going to held back from getting that top number there is a very good reason for them to change the contract to make being a top number less desirable. That is what I would do. It certainly is smarter that beating your head against a wall while acquiring legal debt and liabilities.
One more reason for AC pilots to start thinking long term of the reality of the law in Canada and not going down in flames on emotional roller coaster of "It's not fair, it always being that way"