Sadly, even medical software has problems, such as malfunctioning pacemakers and radiation therapy machines that severely overdose patients. A better analogy perhaps is that every vote should be accounted for in the same way that retailers and banks track every dollar that comes in, with video backup to catch errors and thieves.
I'd like a solution that's as serious and scary as can be, something that will forever silence those jerks at my polling place with their little electioneering buttons and giggles over "vote early and vote often" and other such nonsense, all the people who go from one polling place to another to vote multiple times, the thugs intimidating poll watchers, etc.