you have a 95% chance of never seeing it. Don’t pull the lever.

I'm confused: 0.99^32 = 0.72, not 0.95. And if you know that everyone except the last guy won't pull the lever, that's still a 1% chance of killing everyone on earth (average expected deaths: 70 million) is way worse than definitely killing one person!

(Edit: unless "don't pull the lever" means killing that one person, because it isn't clear which is the default "no action" outcome. In which case, never mind.)

(Edit 2: if you know the 34th and last person might be a sociopath, you're best off if the first 27 people might also be sociopaths.)