There is also voice over work. Manga and Anime tend to be REALLY different BECAUSE of these time constraints and then they have to write a new script to fit the changes made to accomadate deadlines. 700 people? Show me 700 people in the credits and maybe you have an arguement. You can just look at people that ink comic pages, there aren't that many people in a room and this is just to finish a single book with much more than a weeks time.

It also takes time to edit the work to make it work in their ad spam and crappy stuff like that, there is no magical little elf that says "Animation is: Draw, film, go!" More like "Write, edit, plan scene, edit, draw scenes, edit, color scenes, edit, draw characters, edit etc etc etc etc."