'm not a fan of management sims, so if you ask me what the point is, I'll say there is none. They're a simulation (more akin to toys than games) of bean-counting (as much fun as a stick in the eye). A fan would probably tell you that the point is to make the little people do your bidding (maybe not in those words). Essentially, the aim of the game is to "build a thriving nation", which, to me, means that there is no clearly defined goal, or it is too subjective to be definable,
A nice thing with simulation games is, you can have a big amount of goals.
These can be set by the player himself *if* the game allows for some creative managing.
(movable/changable things on a map would allow some creative managing)
They can also be set by the game
Things like "get 100% happiness" are a bit basic, and should possibly be included in the tutorial though.
And stranger goals will likely complicate the programming.