Supposedly, ending the entire drug war would save the country $77 billion a year.
http://www.cato-at-liberty.org/2009/03/12/end-drug-war-and-s...
http://www.cato-at-liberty.org/2009/03/12/end-drug-war-and-s...
http://www.theregister.co.uk/2009/04/07/legalising_drugs_rep...