Do you think it a significant detail in the story that Anil is a struggling writer? Does this explain his behaviour in any way?

Hari Singh’s observation about Anil getting irregular income and Anil’s statement about his sale of a book to a publisher indicates that he is a struggling writer. He lives life according to the flow of money he gets at a given time. When he gets the money he enjoys eating out with his friends. When he is having less money than he even doesn’t accept paying salary to Hari Singh.