Operational needs
Virescit Vulnere Virtus
Not "one person". A manager who has been managing (in different capacities) at FedEx for over 20 years.
And if it's a choice between shipping the package at a discounted rate or not getting the business at all (by turning it away since nothing over 150lb is allowed in the system), I could see FedEx turning a blind eye to get the business.
You can blame the couriers for not doing their job. THEY are the ones who are supposed to stop the packages at the origin.