Legalisation of drugs that have been proven to be safer than tobacco and alcohol

Responsible department: Home Office

In order to boost jobs, GDP, reduce crime, increase tourism, increase tax revenue and decrease the deficit, I believe that drugs that have been proven to be less harmful than alcohol and tobacco. For example, marijuana which has been proven to have no effect on lung function and is close to being legalised the USA anyway. People smoke it anyway, contributing to the shadow economy and funding criminals, thus legalising it would fund the government instead.