Do you think it a significant detail in the story that Anil is a struggling writer? Does this explain his behaviour in any way?
Yes, it is a significant detail that Anil is a struggling writer. This detail explains his irregular income, as he "made money by fits and starts." He would borrow one week and lend the next, constantly worrying about his next cheque.
This financial uncertainty directly explains his careless and trusting behaviour. Because he is accustomed to unpredictability, he does not hoard money; instead, he goes out and celebrates when a cheque arrives. His lifestyle makes him the most trusting person, giving Hari a key to the door and not even noticing if he has been robbed.
Explanation
The textbook context emphasizes that Anil's profession as a writer for magazines is a "queer way to make a living," causing his income to fluctuate. This irregularity makes him comfortable with uncertainty, which translates into his careless attitude towards money and his absolute trust in Hari Singh. Because he is not greedy and is used to financial ups and downs, he does not obsess over his money, making him uniquely forgiving and trusting.