Sure, I'll weigh in, since you're asking.
History, including recent history, is full of people who tortured other people.
I see no reason to believe that defining all of those people as "not normal" is in the least bit justified; that seems more likely to be a No True Scotsman fallacy in action.
Adding a concrete incentive like money probably helps, if it's a large enough sum, but honestly introducing money to the discussion seems to clutter the question unnecessarily. Normal people will torture one another for no money at all, under the right circumstances.