And what happens when you apply for another job and there's the all-revealing question on the application: details of ill-health and sick leave taken over the past two years? That might be the end of your hopes for a much desired new employment.
I am cursed with a "colleague" who hasn't worked a complete four week period for almost three years - you name it, she's suffered from it. It is said that revenge is a dish best eaten cold and one day I'm going to eat a great big bowlful, straight out the fridge.