Noted at :  cognitivedissonance.tumblr.com and authored by Meg Lanker-Simons; I’m just quoting the whole thing because she says it better than I can at the moment.

Uh-oh. Looks like Florida’s mandatory drug testing for taxpayers is costing the taxpayers more than they’re actually saving.
Governor Rick Scott had praised the program when he signed it June 1st of this year, proclaiming, “It’s the right thing for citizens of this state that need public assistance. We don’t want to waste tax dollars.”
However, the numbers are not adding up. From WFTV:
Just six weeks after Florida began drug testing welfare applicants, WFTV uncovered numbers which show that the program is already costing Central Florida taxpayers more than it saves. 9 Investigates’ reporter George Spencer found very few applicants are testing positive for drugs. The Department of Central Florida’s (DCF) region tested 40 applicants and only two tested positive for drugs, officials said. One of the tests is being appealed.
Governor Rick Scott said the program would save money. Critics said it already looks like a boondoggle. “We have a diminishing amount of returns for our tax dollars. Do we want out governor throwing our precious tax dollars into a program that has already been proven not to work?” Derek Brett of the ACLU said.
DCF said it has been referring applicants to clinics where drug screenings cost between $30 and $35. The applicant pays for the test and the state reimburses [the applicant] if they test negative. Therefore, the 38 applicants in the Central Florida area, who tested negative, were reimbursed at least $30 each and cost taxpayers $1,140. Meanwhile, the state is saving less than $240 a month by refusing benefits to those two applicants who tested positive.
I’m not at all shocked by this, and the ACLU is planning to file suit. Oh, and they’re also saying to Rick Scott: “We told you so.” Literally.
The sad part? These measures scare people off from applying for benefits. If people test positive for drugs, it means two things: Either they ingested that substance at least once, and maybe only once, within the testing window – or it’s a false positive. Here’s a short list of things that can cause a false positive:

• Poppy seeds: (Opioids)

• Cold medications: (amphetamines)

• Wellbutrin: (amphetamines)

• Tricyclic antidepressants: (amphetamines)

• Zoloft: (benzodiazepine)

• Daypro

: (benzodiazepine)

• Quinolone antibiotic drugs: (Opioids)

• Sustiva (prescribed for HIV): (cannabinoids)

• Ibuprofen: (cannabinoids, barbiturates, phencyclidine [PCP])

• Foods made with hemp and hemp oil: (cannabinoids)

• Effexor: (phencyclidine)

• Vicks Inhalers: (methamphetamines)

• Zantac: (amphetamines)

• Ultram: (phencyclidine)

• Over-the-counter cough medicine containing dextromethorphan: (Opioids) 

Huh. So drug tests aren’t infallible and they’re not saving Florida any money? As the ACLU points out, Florida should have learned this 10 years ago, when they tried this program and had to dump it for cost reasons.
I’ll indulge the governor for a moment, though. Let’s say there’s parents who have used some kind of drugs in the period before the test. Why deprive children of quite possibly the only support they’ll receive because their parent(s) may or may not have used drugs voluntarily or involuntarily in the testing period? I’m not comfortable with that thought, and any other person with an iota of compassion should not be thrilled with that proposition either.

My tuppence – Maybe instead of drug testing welfare recipients, we should test politicians, not only for drugs, but for brains and a heart.