Fraud has existed for a long time. For the most part society is designed with the assumption that most people will tell the truth. You could create a differen

Fraud has existed for a long time. For the most part society is designed with the assumption that most people will tell the truth. You could create a different kind of society, where the default assumption is everyone lies, but I suspect no one would be able to live under those conditions. Note this is not the same as taking steps to check for lying, it's just a question of what's the default assumption.