Unfortunately, what I gather from the behaviour of my peers is that they lack the spine to do so. They can't muster the courage to draw a line in the sand.
So they keep picking up assignments, fail to do them adequately, and need to perform heroics to cover their ass till some other guy comes along to save them.
Ironically, some of them wonder why they keep getting passed up for promotion. I don't have the heart to tell them why.