If legalization reduced current narcotics enforcement costs by one-third to one-fourth, it might save $6 - $9 billion per year.
Drug legalisation can lead to an increase in illegal drug production due to the increase in public demand for supply
( z1 possible :ARG1 ( z2 lead :ARG0 ( z3 legalize :ARG1 ( z4 drug ) ) :ARG2 ( z5 increase :ARG1 ( z6 produce :ARG1 z4 :ARG1-of ( z7 legal :polarity - ) ) :ARG1-of ( z8 cause :ARG0 ( z9 increase :ARG1 ( z10 demand :ARG0 ( z11 public ) :ARG1 ( z12 supply :ARG1 z4 ) ) ) ) ) ) )