While some people believe that there should be conventional punishment for all types of crime, others disagree and state that the circumstances and motivations for committing the crime should be taken into consideration when deciding on the punishment.
In some cases, the first approach may be good, as it reduces arguments about the harshness of the punishment. For example, perhaps we have a controversial situation where the criminal may be judged in hundreds of different ways, as the committed crime is controversial. At that point, with such a system, there would be consensus on the punishment among the people, as it is fixed. Moreover, the fixed punishment system would motivate people not to commit any type of crime. For instance, in the Greek democratic regime, people were punished in the same way no matter how bad the crime was.