If you are anything like the typical Australian, you probably break the copyright law 80 times a day, according to figures included in the Productivity Commission's final report to the government on intellectual property.

Most of the breaches are harmless, things such as including a copy of an email in the reply to an email. But the commission says that laws that are routinely flouted are bad laws, bringing themselves into disrepute.

In place of the labyrinthine system of complicated rules governing what can or can't be copied, the report released on Tuesday recommends the US system of fair use, under which the use of copyrighted material is legal so long as it is fair, taking into account the purpose of the use, the nature of the work, the amount copied and the effect on the potential market value of the work.

A study released with the report finds that Singapore had fewer copyright disputes after adopting fair use, suggesting the change made copyright easier to understand.