I think it was more of a "follow the money" kind of argument. Governments want to collect as much and pay out as little. One way to pay out less is to create a

I think it was more of a "follow the money" kind of argument. Governments want to collect as much and pay out as little. One way to pay out less is to create a barrier such as drug testing. according to the math, drug testing is "worth it" to that end. Its also fairly politically acceptable compared other more extreme examples such as lowering the welfare amount, random denials or killing poor people. Naturally, I'm not in favor of any of those options.