If you aren't happy with the emotional content of your story, you may want to look at the central story idea. Do your character/characters have a real emotional reason to be doing what they are doing?
Their hunt for the lost treasure should be as much about their emotional reason for needing the treasure as it is about simple greed. That emotional reason should be important enough to make the reader want them to succeed as much as they do.
Maybe the main character is after a magical sword which is the only weapon that will kill the dragon currently ravaging his homeland, and he doesn't really care about other treasure and the life of drunken decadence and dancing girls it promises the other characters.
Maybe the other characters have laughed at him, but they've admired him and gradually they have been drawn into his quest for the sword, and in the end, they'll choose to get the sword with him and lose the other treasure.
Maybe the one who laughed the hardest and made the main character's life hell along the journey will be the one to sacrifice himself so that the hero can rescue a homeland the scoffer has never had, but now wishes to have with his whole heart.
Now that's a story that will grab your reader where a simple quest for gold will not.