She obeyed his directions very punctually: perhaps she had no temptation to transgress. Living among clowns and misanthropists, she probably cannot appreciate a better class of people when she meets them.
Non-stupid people always underestimate the damaging power of stupid people and keep forgetting that to deal with stupid people always turns out to be a costly mistake.
Cipolla warned that the damaging potential of the stupid person therefore depends on the amount of stupidity inherited, as well as their position of power in a society.
If Tom helps himself, but causes Jerry a loss, he's a bandit. And if Tom does something that's of no benefit to him, but causes Jerry a loss he's stupid.