We tried that once, as a nation. It was a dismal failure that gave us rising homicide rates, drive-by shootings, and gave birth to organized crime. They're nothing but price supports for drugs. By making drugs illegal, their price has shot through the roof. This causes an increase in thefts as addicts have to steal more to pay for their habits.
Huge profits mean more money to support organized crime, which leads to even higher crime rates.
And the bigger the profits, the worse the class of criminals are that get involved. It's a massive downward spiral. The drug laws are killing our inner cities, killing our children. Amnesty International should drop by sometime. Instead of Al Capone and the Gangs, now it's Escobar and the Cartels.