Thanks for the pretty high number of posts!

If you look carefully, you'll see that the OP and the first poster was both myself, and "read the f'in manual" was actually a note to self to what I should've done in the first place.

As for the abstracted industrial system, I value immersion above everything else when gaming, so I wanted to understand what I'm doing to the Empire when I'm setting those sliders. The answer "it's a game mechanic to enforce prioritization" is not a very immersive thought, now is it?

Anyway, the concept of routing highly trained manpower does make sense.
One can compare this to Risk and Chess: (generalizing VERY heavily) both feature a battlefield, both are very entertaining games, but while Risk's rules can be explained (you have to leave troops behind to quell resistance, quasi-realistic territories, etc), Chess' rules are totally abstract (what on Earth makes bishops move only diagonally?)...
It's only that I prefer the first variant for my precious "immersion" and I sought a semi-realistic explanation.