this is not true
The legal system includes unwritten laws derived from ancient custom and usage.
Perhaps because they could take advantage of the absence of a formal law and start charging for whatever they want... the plebians have no protection from the law, so they would have an advantage if they wanted to start "renting" out farmland or lowering wages, knowing they could replace the workers.
It might benefit them if there was no law and they could argue their case before a local authority, claiming that they didn't know, and there is no law to that effect. The problem would be *knowing* there was no law. If they did know that, then they might be able to take advantage, or claim land, or do other things to give themselves a boost in life, depending on what laws were absent, or just a matter of tradition. They could argue that things need to change, and it might be more open to interpretation.
Common Law
unwritten they pasted them down using dances and stories
There is no unwritten constitution, so no laws are made as a result of one.
judicial reviewThe unwritten constitution includes the practice of Judicial Review of Laws.
He wrote many unwritten laws
this is not true
There is no unwritten constitution and the election laws for president are in the constitution.
cabinet of advisers, 4 year term
Unwritten laws in the Philippines are not written in books but it is through oral method with the implied understanding while written laws are written in books in which when violated will fetch a sanction.
Great Britain
unwritten laws that came from local customs
The result was the first Roman code of written laws, the laws of the twelve Tables.
many unwritten laws based on local customs