That last question really bothers me. Why do they (the question writers) not consider Arthur motivated? He did something he loved. He loved his family and spent time with them. We don't have a clue how much money he made - but maybe he made a decent living and it just cost a bundle to raise a slew of kids - his choice. He appeared unsuccessful by the world's standards, but I think he was very successful. He could look at himself in the mirror. I think for the most part, his family enjoyed his company if not looked up to him (I think many did look up to him).

Motivation is hard to quantify.