What a surprising response from you. So open minded! Here's a hint all-star, if you weren't clever enough to fire the employees you reference, FedEx made a bad choice promoting you to management. Superstar loader???, more accurately superstar freeloader! You'll be looking for new butts to kiss before long, but if you do manage to stay with FedEx I hope you go all the way up. UPS will succeed long into the future with their main competition run by folks like you.
You shouldn't have to be clever to fire a lousy employee, when a company has a shady union you do have to be clever. I would like to stress that I'm not the type of manager that gets excited about firing people but how long should someone be able to get away with lousy performance, calling in sick, etc... If you had a company how long would you let things like that go on?