I agree with Jorge. People decieve and take what is not theirs on a regular basis-whenever they perceive it to be advantageous to them, and that they can do so with no or little risk of being caught by those who can impose sanctions on them of one sort or another--and what restrains them in such a case is simply their respect for the other person. If your respect another person, you will not decieve or steal from that person.
"Rabbi Chaninah the vice-high priest said: "Pray for the government, because if people did not fear it, a person would swallow his fellow alive.")(Avot 3:2)*

*Don't worry. If that sounds too pro-government, I can balance it with a couple of anti-government teachings from the same source :)