Right, but a legion is actually made up of structures that were at their highest around 80 people. Not only that but you have to take away freedom and decision making rights from almost everyone at the threat of severe penalties if you’re not doing what you’re told, at the same time visibly displaying the hierarchical status of everyone at all times.

Interestingly army structure haven’t really changed that much since then.

Fair enough I suppose. But realistically, aren't corporations organized in a similar manner? You're mostly working with people in your workgroup, then your division. You're not interacting with the whole company, unless you're at the executive level.