[AFMUG] Complaining Employees

[Matt Hoppes]

How do you deal with employees that seem to always be complaining about 
some aspect of their job, and always have an excuse for why something 
was done wrong?  They think they are dedicated, claim they want to be 
dedicated, but repeatedly fail to produce, create work for others, fail 
to perform even the simplest of tasks properly and while, when met with, 
will say they understand and are working to improve - fail to improve.

Is this behavior fixable?  Thoughts?