Be careful, this question could trip you up. Try to avoid mentioning money at this point. Even if you have been retrenched or are struggling - try to remain positive at all times. Try to avoid sounding desperate. If you were fired, you need to think about your answer and have a good explanation. Give this some thought before the interview and really think about the reasons for wanting the job. A good reason could be that the position will allow you to grow and get experience.