Pole shift,
You may think you are a proven and experienced aviator but what exactly have you brought to the company with regards to commitment??...... Because that is exactly what the FZ seniority system rewards and for everyone who has endured the bad rosters over the last few years, it actually finally means something.
By their very nature, a DEC has probably left a not so stable job (or even unemployment) to come to FZ because the terms and conditions are better or they had no other option. Count yourself lucky if you fall into either bracket. Just because you are a captain, it doesn't automatically entitle you to better rights than your fellow, longer suffering FO. You may not like it but it is a fair system and it is one that every pilot in FZ knowingly signs up to.
I suggest you stop whining about it on here, stick your head above the parapet and go and make your thoughts heard where it counts if it really bothers you that much....... Or not.........
A little humility and respect goes a long way in the flight deck and the crew room!