hmm, that would imply a HUGE deal of micromanagement...for normal unit size, a peasant unit is what, 40, 60 ? You'd need to recruit a few _hundred_ units to calm down your huge city...and that from every huge city ?
no way I can see this working in the long term...
I like the idea, don't get me wrong, and I was thinking myself along the same lines, of somehow culling the population, but if you do the math, I am afraid you'll agree with me...