[setr]

Because I could, reasonably, find the damn thing; the evidence physically exists. And the threat of doing so increases trust in the system (even if no one does it), because if worst comes to worst, I can just find the slip.

In a digital system, I'm not finding jack shit. It doesn't exist anywhere except as a counter, I can't check whether it's my vote or randomly created after the fact (after suspicion was announced), and I can't trust the system itself, because it's defined by, developed by, and operated by some random group of people who managed to slap the thing together and make a sale. I can't get in there and check out any of it myself (even as just a vague threat), and the conspiracy group is sufficiently small as to be viable (I only have to "convince", what, 40 people, to cheat the votes?).

What I don't understand is why not use something like the SAT exams -- trivially hardware-counted, but also physically transparent and available -- and solve like 90% of the problem that way?