Dan Airley has done a great video on the impact of micro versus macro dishonesty. You can watch it here: http://vimeo.com/49462153 - the gist is that large number of people being dishonest in a minor way have a greater impact than a small number of people undertaking major dishonest actions.
He tested 30,000 people. The results of the experiment found 12 “big” cheaters and 18,000 “small” cheaters. The impact of the big cheaters was around $150. The impact of the “small” cheaters was around $32,000....More