In the story My Lost Dollar by Stephen Leacock, why has Major Todd failed to return the loan? What does it tell us about him?

Major Todd has failed to return the loan of one dollar as the monet borrowed was a rather small sum of money. Due to this reason he has almost forgotten to return the loan. Also the money was borrowed from a close friend and probably Major Todd thought that it was not important between friencds to be concerned about this small sum of money. This tells us that Todd was not only a careless and forgetful man but also someone who takes friendship for granted.