Hear me out. Dwarves are actually communists and not serfs in an absolute primogeniture monarchy. Here is how and why: Once the dwarven guilds/unions had distributed the wealth produced by dwarven labour evenly among the dwarves, they realized they were already in a post scarcity utopia. Now, they started diggy digging just for fun and named one person king as a joke so they had an excuse to forge exquisite regalia, coins and other stuff. At some point they just started putting it in a hole so they could make space for new creations.