DadofB&GI got better grades in college once I started working ten hours a week. I don't think it's too onerous a requirement.
That said, my older son has said he doesn't want to work first term next year because he's taking a course that is a notorious time sink. He's making enough this summer that he'll have enough spending money without working anyway. Those work study jobs are important stepping stones on a resume.
I wouldn't want my employees taking a lot of personal phone calls, but when I first had a job we had a formal scheduled break mid-morning that would have been plenty of time for making doctor's appointments and the like. There should also be a lunch break (though I realize some doctors close their offices during lunch.)
So Marian, can you scan pictures instead of copying them and then print them out on the computer?
I actually do the same thing in my office, but it's because I don't do copies in house, so it's easier to keep track of them.