Well my girlfriend has worked her entire life, she started as a cashier in her dad's grocery store at the age of 11. Her life = sucky because of work.
I on the other hand have never had a "job" (until this past summer holiday) went to work at New World in Menlyn one December but for R9 an hour and working from 8AM till 9PM I decided to leave after the first day.
She actively encourages me to not work saying I should enjoy my life because I still can. Whereas she wishes she was in my position. I could explain everything but i'm not going to volunteer the information unless asked for it.
I say if you can get by by not working a part time job, do it.