I think super accurate mass surveillance is inevitable. It goes with expanding technological capabilities, both government and civilian. I think the real question needs to be focused at how it's applied, whether it's used solely for good or evil. Fretting over whether or how it's coming is simply illogical, focusing efforts on making sure it's used properly is the only forward thinking, reality accepting solution.
Mass surveillance isn't inevitable, it's a political decision and a decision which is reversible. PRISM and Xkeyscore didn't invent themselves - they took money and manpower and above all political will to come to fruition. We have nuclear weapons, but nuclear proliferation isn't inevitable. Dismissing people who are opposed to the abuse of technology for purposes which are fundamentally anti-democratic as "illogical…
I mean, lots of people think technology leads to economic inequality by devaluing human labor, resulting in unemployment and pay stagnation, but you probably agree with me that it would be futile to pass a law for the express purpose of limiting industrial productivity per worker.