I dunno, i reckon there are a hell of a lot of people who just rock up at their jobs, do what they have to do and go home. There probably isnt really a good real world job comparison. Probably like most jobs, the ones who do that little bit more move further up the ladder while the ones who just turn up stay where they are. Milf is clearly the latter. He's got no drive at all to be the best.
His smoking and his fondness for a certain soft drink isnt really a bad attitude problem as such ( although i can see why people think thats an attitude thing ). I think its not smart and he could be more professional. Again though, i think thats more with him having a lack of drive to be the best. Him just doing enough to get by isnt anywhere near good enough.