Maria is not a workaholic, but can sometimes run into the danger of overworking herself for other reasons. She never wants to do something that would antagonize others, and being a bad employee falls into that category. So she is often uncomfortable while working, always looking for something to do as not to be idle. She doesn’t like stopping unless she sees others doing it.
Though through the years she’s learned to tone down this particular brand of anxiety so she doesn’t run herself into the ground, but there are still times where particularly intimidating co-workers and managers cause this behavior.
The first day or so of the gravel war was this way, as she was in an unfamiliar and frightening setting. There was more needless back and forth in the field, more deaths from being spotted. However the physical exhaustion quickly set in, and she simply didn’t have the energy to maintain such high activity. That and Maria isn’t stupid enough to not realize she was dying often.
Now she still insists on being very focused on work on the field, not mainly because of a sense of professionalism or fear for her life (though survival really is a factor), but mostly out of a long ingrained kind of obligation and the nagging anxiety of being berated.