No. I don't have the calculations on hand, but I have arbitrated forced overtime when the corporation chose to force individuals to work while people sat home not earning any income.
The big thing about overtime for the Canadian Union of Postal Workers is that it's non-pensionable. There is a concern about the pension fund. If they force Craig Dyer to work three hours of overtime, that is non-pensionable, but if they offer it to another worker to give them a job, then they have to pay into the pension.
I don't have any numbers, but I do know that since the postal transformation, there is a staggering amount of overtime work. The corporation nationally does have those hours.