Drug use is a moral issue ..... not a police issue. 

Drug abuse is a public health issue ..... not a police issue.

uneven police enforcement 

  Drug testing costs time &  $$$

Federal Folly

In 1969, the federal drug enforcement budget was $65 million.  Last year it was $19.2 billion, greater than a 295-fold increase.  (These figures don't include the state and local costs.) 

If the price of coffee, which sold for 25 cents a cup in 1969, had increased at the same rate, coffee would now sell for almost $75 a cup - more with sales tax.

What have we received for our so-called "investment" of about $1 trillion in the past 35 years? Absolutely nothing.  Nothing except the largest prison-industrial complex in history. Thanks to our drug war, one out of every four prisoners in the world sits in a U.S. jail or prison.