Holding the threat of death over people isn't the way to a "high-trust society." Maybe you think it's the way to something similar, but you have to give up the word "trust" because it doesn't apply here. If the only reason I think a man isn't going to rob me is because I will shoot him if he does, I don't trust that man.

A society which only has low crime because everyone is able to use lethal force to defend themselves and their property isn't one I would call higher "trust" than one that maintains the same crime levels without that threat.