Now if I understand the 'welfare' system properly get a drug bust and you lose your housing and other major benefits. If you get busted for drugs no one comes to the house demanding your firearms. What works against the drugs and alcohol hinder a rise out of poverty argument is the rates of abuse seem the same in the working sector. The problem with the generalization is you can test positive for alcohol, just not intoxicated at the time- drugs have zero tolerance.
My thought for both business and assistance is a cup of pee to sign on, after that only if you can document signs of drug abuse.
Gipper- you can pee clear and argue all you want- if the specific gravity doesn't come back correct but they will reject you. Wave all the empty water bottles you wish. Now-a-days most tests screen for the cover crap head shops sell, as well as high Niacin. beating the test is difficult, more depends on what test they use more than what you do to dodge it.