Why put your trust in someone whom you don't know! And it's not like rags don't know Paaki?! He knows her very well! And he don't trust Paaki!
Did he not grow up with both Paaki and Kalpi?! So he knows both inside out!
It's the same scenario that is happening in the chawl with manda and her ways!
Pakiya knows her so he will always have an eye on her!