Why did the 2nd spirit take Scrooge to the miners' hut?

The Ghost of Christmas Present takes Scrooge to a variety of Christmas celebrations, including a party aboard a ship and Fred's party, which Scrooge had been invited to, but declined to attend.  While the miners' hut is not given a great deal of attention, one can picture it as a desolate and isolated place.  Yet, even in such a lonesome outpost, the miners are celebrating Christmas.

This is in direct contrast to Scrooge.  Even though Scrooge is in the midst of a town of celebrating Christmas, and even though he has a party invitation from his nephew, Scrooge is not celebrating in anywhere near the scope of that of the miners; in fact, he is not celebrating at all.  Contrasting him to the remote miners only helps to further drive home this point.