This is another moronic, kneejerk, RW boogeyman that has proven to be an expensive bumper sticker.
https://thinkprogress.org/what-7-st...ng-welfare-recipients-c346e0b4305d#.e6znx8s11
"According to state data gathered by ThinkProgress, the seven states with existing programs — Arizona, Kansas, Mississippi, Missouri, Oklahoma, Tennessee, and Utah — are spending hundreds of thousands of dollars to ferret out very few drug users. The statistics show that applicants actually test positive at a lower rate than the drug use of the general population. The national drug use rate is 9.4 percent. In these states, however, the rate of positive drug tests to total welfare applicants ranges from 0.002 percent to 8.3 percent, but all except one have a rate below 1 percent. Meanwhile, they’ve collectively spent nearly $1 million on the effort, and millions more may have to be spent in coming years."
http://www.nytimes.com/2012/04/18/us/no-savings-found-in-florida-welfare-drug-tests.html
"Because the Florida law requires that applicants who pass the test be reimbursed for the cost, an average of $30, the cost to the state was $118,140. This is more than would have been paid out in benefits to the people who failed the test, Mr. Newton said.
As a result, the testing cost the government an extra $45,780, he said.
And the testing did not have the effect some predicted. An internal document about Temporary Assistance for Needy Families, or TANF, caseloads stated that the drug testing policy, at least from July through September, did not lead to fewer cases.
“We saw no dampening effect on the caseload,” the document said."
It costs far more than it saves. A very typical RW action.