Drug testing programs in other states have reliably found that drug use among recipients of social assistance is actually lower than it is among the general public, but Michigan's program found zero drug users.
Michigan's "Substance Use Disorder" pilot program only flagged one potential user during a year-long trial and didn't actually uncover any drug users at all.
Of the pool of 443 potential candidates for the program, only 27 were identified as possible substance abusers. Ten of the 27 had already been enrolled in some type of counseling for drug use, exempting them from being tested. Of the remaining 17, only one participant was identified as requiring a suspicion-based drug test, but that case was then closed—meaning the program did not catch a single person in violation of the policy.
While other states have spent millions of dollars on their programs, Michigan spent less than $1000 on theirs. That could change, however, if they decide to proceed with the program even though the pilot didn't results in a single drug test being administered.
I don't like to play doomsayer, but states that were previously denied permission to drug test food stamp recipients (such as Scott Walker's Wisconsin) may be granted permission under the Trump regime. It remains to be seen who will be nominated to oversee the Department of Agriculture and Food and Drug Administration. Those appointments could have far reaching implications.