Feels the taint of crime
There is an underlying theme of natural justice coming from moral crimes in the story. There is also justice for legal crimes. As all of those who commit legal crimes are all punished. Loyalty and Kindness are both rewarded. We are made to feel that the true and faithful Herbert deserves his happy marriage to Clara and that Joe and Biddy deserve a similar satisfaction. Magwitch is an instrument of justice. He tries to reward Pip for helping him on the marshes. By trying to make him a 'gentleman'. He also makes Compeyson pay the ultimate price for his past crimes.