Do all Salad Dodgers have better personalities?

There's this bloke I work with who's Dad died at an early age, he used to eat fried brekkies, drank beer and smoked 20 a day. Consequently his son tries to eat healthily and doesn't smoke or drink(He has a half at the Christmas party!) He is one of the biggest pratt's I have ever had the misfortune of knowing, he creeps round the boss, moans about everything, makes scrooge look generous and licks the flour off his salad buns from the bottom of his lunch box! Does anyone else out there work with such a ringpiece?