a lot of drug testers either want extra money or don't really have a job. there's lots of story of them going kinda nuts or having weird side effects develop
if you don't have a lot of money it seems like a ton (and its a pittance to the drug co's), but its really not safe at all (even though they try to limit risks). I wonder if the drug co is going to pay the families and full medical and life costs if these guys manage to live... cause they're probabyl never going to work normal jobs again.