If what translates into cash? Academics make money from their work. Yes it's a motive but it's an obvious one not an ulterior one.
Maybe you are right. Maybe it is just "a motive". I mean when you really think about it, he would not be saving anyone as such. The debt needs to be transferred from one person to another, so society as a whole would not benefit from acting on his information. I mean, it isnt really a noble gesture as some people might say.