Images: The the Dirty Double Half-Dozen

[nemonowan]

Don't be. They had this in my country once, it tasted like a common McFlurry with some pieces of cardboard in it.




Nobody would gain from secretely, untraceably altering a few million individualized tax returns. And since they are individualized and feedbak is returned on them, any alteration that causes a significant effect would be trivial to discover.
On the other hand, some very powerful groups would gain a lot from secretely, untraceably altering a few million anonymized votes. And since they are anonymized, even alterations with very significant effects would only be detectable by esoteric statistical analysis that would inevitably be contested, disputed and most likely dismissed in the name of "keeping the trust in the system".