What is the purpose of paragraph 5's discussion of the name "dillingham" in the gift of the magi?

Passage five of "The Gift of the Magi" summons the meaning between long names and the more elite classes of society. That is, sovereignty, experts, and those having a place with the "high societies" regularly relate to their full names. Particularly on account of eminence, this is to underline a family name that the normal individual partners with control and grand societal position. 
At one time, Della's significant other was making an agreeable $30 every week. This cash conceded them a specific way of life and societal position, for which they had incredible pride. One appearance of this pride is utilizing Jim's full name: Mr. James Dillingham Young. Since the young fellow makes just $20 in seven days, they are battling monetarily and socially. The family status has declined, which is the reason the name on the letter drop "appeared to be too long and imperative." 
In any case, this same passage additionally calls attention to the false notion in this line of reasoning. The story recognizes that society for the most part esteems cash and economic wellbeing over different things. Della cries since she can't bear the cost of a legitimate blessing. However the story watches: "Yet when Mr. James Dillingham Young went into the outfitted rooms, his name turned out to be short to be sure. Mrs. James Dillingham Young put her arms warmly about him and called him 'Jim.'" This sets the phase for the lesson of this story. It doesn't make a difference the amount Della's significant other makes, or "to what extent" his name is, on the grounds that toward the day's end he is her "Jim." Their adoration for each other supersedes some other material or social thought. This is the position of the story general, and the fifth passage inconspicuously makes ready for this disclosure.