No, there are part time jobs in Mabi, and some of them are pretty much required for the game (like holy waters). It's kind of frustrating, grinding part time jobs.
The one thing I liked about Mabi, though, is that there isn't this HUGE requirement to grind to get anywhere. You can do quests to get AP, and once you hit like level 30-ish (at least when I was playing) you just sorta play, and then you rebirth and get to have the easy first 20 levels to get some AP again, and then it's really just a matter of doing what you want to do until it's time to rebirth again. At least that was how I played.