Reason Magazine has an excellent essay analyzing the rapid growth of workplace drug testing, and documenting how these odious programs have become a billion dollar industry.  Here’s a snippet:

The Golden Age — How Americans learned to stop worrying and love workplace drug testing

Observers still debate how much safer and more productive drug testing makes the workplace. But there’s at least one outfit that has no complaints about its efficacy. Forty million drug tests at an average of $30 a pop equals a $1.2 billion subsidy the federal government receives from the private sector each year to help prosecute its endless War on Drugs.

You can read the full text here.

I wrote a similar essay for Reason back in 2005 documenting the rise of DATIA, the Drug & Alcohol Testing Industries Association, which you can access here.