Well Florida is a prime example as to "How to waste tax payers' money" and "How to get taxpayers' money for my family's own gain (so says Governor Scott)." Governor Scott saw a profit to be made from this where his wife's company will benefit from taxpayers money. So far 98% of the people who applied for welfare tests came back negative and so the state will have to reimburse those recipients. The other 2% are challenging the results and here is where the state will spend more money in court to litigate (more taxpayers' money being wasted).
Although it may seem like a good idea to test people who are applying for welfare, the bottom line is is that it will eventually cost you the taxpayer more in the long run (time it takes to file papers for testing, reimbursing testing facility if there is a negative result, and court fees for litigation).