Flyaway777 has hit the nail on the head!
The 777 fleet is doing every type of operation known to aviation and is doing it at a "low cost" pace, with inadequate rest in between flights, nowhere else is this being done and it's not sustainable for the troops or their families.
The mixture of earlies, nights, turnarounds longhaul and ULR in no particular order and without any set rules is punishing to the human body, no amount of cash thrown at me is enough to trade my health, quality of life and family.