Pretty much.
They're clearly the only ones working to earn/recover all the gold from whatever much better civilization existed before the main setting, collecting it so they might then be harvested by the Home Invasion Patrol, who then bring it back to their lairs where merchants gouge them for the basic necessities of invading homes, and then distribute it to the rest of their filthy stone and wood warrens, which are then raided by orc, hobgoblins and undead, who are themselves then home invaded, only for those home invaders to get taken out by dragons who hoard the treasure until society collapses completely again and then intrepid goblins start the cycle anew.