This would give the government a chance to gain tax revenue from it; offer new medication opportunities for various health issues and alsobring different cultures and people with different background to unite and become a peaceful society. By the legislation of Marijuana production and distribution the government can afford to improve our country without charging the tax payers. 

Marijuana has been proven to have less damaging effects than alcohol and cigarets which is readily distributed across the nation. By legalising Marijuana, crime rates would have a decrease too, as people wouldn't be committing crime such as theft to be able to make money to buy the drug. You can easily grow your own and not commit any crime to afford the drug.