Mmm, I seem to disagree with the prevailing opinion. Busy people forget stuff, even if it's important, and if a tiny monetary reward can help to improve the results of a clinical trial, as well as prevent a life-threatening deterioration in a patient's condition, there doesn't seem to be much of a downside. To say that we can either pay forgetful, bad, evil slackers or give the money to good, honest hardworking people who can't afford their medication seems a false dichotomy, to me. Before automatic bill payment, I forgot to pay my bills on time fairly regularly, not because I don't care whether I have internet, and expect leeway over the poor kids in the inner city who can't afford it, but just because I'm absent-minded.