How does Dickens present Scrooge's character in stave one of A Christmas Carol?

In stave one of A Christmas Carol, the reader is presented with a number of scenarios which Dickens uses to convey Scrooge's character. 

In the opening paragraphs, Dickens talks about Marley's funeral. Scrooge was Marley's only friend in life and sole mourner at his funeral. But he appeared to feel no emotion about Marley's passing:

"Scrooge was not so dreadfully cut up by the sad event, but that he was an excellent man of business on the very day of the funeral."

We see Scrooge, then, as a cold and calculating administrator who values his business affairs over his relationships with others. This is further emphasised by Dicken's description of how other people in society view Scrooge. Children and beggars, for example, do not stop to talk to him in the street, nor did anyone ever enquire about his health or well-being. He even spurs his own nephew who invites him for Christmas dinner. 

Further on, two gentlemen call on Scrooge to ask for a charitable donation to the city's poor and needy and this provides us more key information on Scrooge's character. His response is characteristically miserly: he feels nothing for the plight of the poor and, in fact, believes that their deaths would be useful in "reducing the surplus population." For Scrooge, poverty is the result of idleness and the gentlemen cannot inspire in him any feelings of empathy or philanthropy: 

"It's not my business,'' Scrooge returned. "It's enough for a man to understand his own business, and not to interfere with other people's. Mine occupies me constantly. Good afternoon, gentlemen!''