I can tell you from experience, that if the retirement age is extended to 60 from your current 55, it will delay peoples' promotions by way more than the 2 years mentioned earlier on. Despite the expansion program, I believe the training system limitations and command failure rates will put paid to any 'promises' of no real delays from your managers. Additionally, any shiny new aircraft that are on the order books today may well disappear in a puff of CEO smoke in 6 months time. It is easy to 'dream up' expansion plans to help allay the fears of those sitting on the fence! A certain Southern Hemisphere airline did just that not too long ago...