He is his “double” because he himself was poor and begging for money from others but did not make it obvious like the other man.
Explanation:
The chef think of the beggar as his "double" because he himself (that is the chef) was poor as well and begging for money from others but did not make it obvious or show it for people around him to know like the other man was doing which was why the chef's character is changing because the chef didn't want to walk past him because he felt guilty of the act ot action been carried out by him.
