The busman does have a point though. Try and keep the emotion aside and look at the realities.
How many people on the right seat at EK (who had todays requirements for dec) would have joined as f/os if the DEC programme had been running at time of joining.There is no doubt you are getting a bum deal but the policy now allows for people to join as Captains. The requirements are not unrealistic albeit different from earlier times.People applying did not sign your contract nor did they double cross you. They also owe you no solidarity.There is no great pilot fraternity or society to owe allegiance to, only ones own agenda. If they break a collective agreement that is different but none exists. Its business not personnal. They dont know you and didnt influence your freely made desicions. Harsh but a fact of life. How many EK captains intend to return to their homes or other jobs as an f/o. Not many I'll wager.Seniorty, right or wrong is a dying concept.
Comparison to BA and the like for seniority are unrealistic as EK was an off the shelf National airline and stocked with pilots for hire, not an inherited national institution wih associated customs, full of hardworking nationals with a career structure for life. The owners of this off the shelf airline have changed the rules, people have to play the cards they are dealt. The DECs of today are no more or less mercenary than than any previous or current non arab pilots at EK to make a buck, and/or a short cut to a big command. All that is different is whats on the table for the latest policy.
As for the Brian chap. He is a yank after all. Lucky , loud and nieve.