Most T employees are stagnate in their positions and are no longer as marketable as they would like to be. They're stuck at T not only because they're a little long in the tooth, but also because of their lack of skills that can be used at another company. If you're a technician, that's one thing, but if you sit behind a desk, you might want to improve your marketability!
@vgm+1hjam0lx tells the truth.