It seems clear that the RAND study shows that there is in fact increased marginal benefit if you're chronically ill and the cost of paying for your health care is significant. The abstract explicitly states that.
Further, it documents whether or not there's increased marginal benefit for free health coverage rather than copay, rather than increased medical spending. They show there's no increased marginal benefit among the affluent and the healthy, which I suppose indicates that reactive treatment works as well as preventative treatment. The study in fac... (read more)