Florida welfare requirements

Florida has just passed a law that is, in my estimate, common sense and should be the law of the land: welfare recipients in the state of Florida must pass a drug test. However, the ACLU says this is a violation of their constitutional rights, namely, the right preventing unreasonable search and seizures. However, the ACLU fails to realize that welfare is, in itself, a warrant to find if they are addicted to drugs. Because if they are, we don't know that welfare will not go for drugs. The tests are around 35 dollars, but the person will be reimbursed if they come back negative.