TL;DR If your job helps others, you may want to do it [1] for reasons other than money and therefore get paid less. [1] http://en.wikipedia.org/wiki/Maslow's_

TL;DR If your job helps others, you may want to do it [1] for reasons other than money and therefore get paid less. [1] http://en.wikipedia.org/wiki/Maslow's_hierarchy_of_needs http://en.wikipedia.org/wiki/Maslow's_hierarchy_of_needs