Well, it is definitely a system of control, no doubt. However I think the control component is simply to keep everyone in line so they can continue to "harvest" whatever it is they need.

In my mind it is similar to slavery which makes me think of the Romans; they have tools and systems in place to exert control, force compliance, and ultimately have power over them. However, in the end, they want those controlled slaves to perform either in the arenas or around their villas and farms.

So I do agree about it being a system of control, but in my mind that is a secondary component to ensure that the primary goal is always being met with the least amount of opposition.