Okay, imagine I'm your average megalomaniacal evil overlord. After a brief but spirited scuffle with local heroes, I've managed to employ an army of coal-fed death robots to seize control of the Earth, which now belongs to me. Instead of solving all my problems as I thought it would, this has surprisingly opened up some new ones for me. Specifically, how to maintain the darn thing! See, all the Earth's inhabitants are now my possessions, and I am known to jealously guard my possessions. So obliterating them is a non-starter.
Clearly the social pyramid will look flattish from a distance, because of the ginormous space-elevator-sized spike corresponding to me. That's not a problem. The problem is how to fulfil my basic requirements:
There has to be some amount of suffering; the groans of my people are as music to my heart
I don't want to push it too hard, because it can be so very tedious putting down rebellions
There must be a picture of ME prominently displayed in every public building
And every private one, too
While the world's workforce must be available to fulfill my outlandish whims, most of the time I don't want to be bothered with routine administration. As a typical example, I may require that Mount Rushmore be recarved into four copies of my face
I must be careful at all times that no subordinate becomes powerful enough to threaten me
There needs to be a constant low-key search for the destined bride of a foretold hero ... I'm getting rather tired of being a bachelor. If this one is too difficult, I could settle for falling in love with my chief henchman's daughter
So ... how can I (at gunpoint) reorganize society to fulfill these reasonable basic needs?