From what I have seen the US government spends roughly $15 billion a year on the war on drugs. That's a lot of wasted money that could be spent paying for programs that we do need: education, transportation, etc. Frankly I probably would not redirect those funds anywhere as much as I would favor simply eliminating them (along with a whole lot of other useless shit) to reduce our yearly budget deficits
$15 billion is a very conservative estimate.
Consider that every civil servant involved in the drug war, from the federal, state and local police to the judges, court personnel, prison personnel, parole and probation officers, etc., in addition to their salaries will receive pensions for an average 20 - 30 years. That projected cost must be factored. Also consider the cost of all the equipment, from ordinary police uniforms and hardware to cars, boats, planes, helicopters, exotic electronics, etc., used in this futile, wasteful activity, along with the cost of maintaining it.
Consider the cost of all the crimes committed by drug addicts to support their habits. The vast majority of burglaries and car thefts are perpetrated by junkies who cannot otherwise afford the cost of black market drugs. In order to pay for $10 worth of street drugs they are forced to steal property worth $100 and many of them use more than $100 (street price) worth of drugs a day.
Consider that more than half of our inordinately high national prison census of two million+ are drug offenders and that it costs an average $35,000 - $50,000 per year to confine one inmate. And consider that once someone has been convicted of a crime he or she becomes virtually unemployable and either ends up on welfare or lives by stealing. Also, consider the cost of building and maintaining all the prisons needed to house so many drug offenders.
I am certain that if the fully comprehensive cost of the drug war were calculated it would be well over $100 billion annually. And money is not the only cost of this social cancer because it has nudged American society closer and closer to a police state.
The bottom line is the War on Drugs is totally counterproductive. It has been a proven failure for more than twenty years. And whether or not the American nation survives we may rest assured historians of the future will denounce the War on Drugs as an example of massive political corruption.