There’s an implied max/min problem here: the intersection of a curve representing the amount of wealth you need to spend on guards to maintain stability in the presence of a widening rich/poor gap and the amount you can save on guards by creating social mobility through education, health, and social welfare is the point at which you should stop paying for cops and start paying for hospitals and schools.

This implies that productivity gains in guard labour will make wider wealth gaps sustainable. When coercion gets cheaper, the point at which it makes “economic sense” to allow social mobility moves further along the curve. The evidence for this is in the thing mass surveillance does best, which is not catching terrorists, but disrupting legitimate political opposition, from Occupy to the RCMP’s classification of “anti-petroleum” activists as a threat to national security.