“The study suggested that cost sharing should be minimal or nonexistent for the poor, especially those with chronic disease.”

and

“Indeed, subsequent RAND work on appropriateness of care found that economic incentives by themselves do not improve appropriateness of care or lead to clinically sensible reductions in service use.[3]”

So basically the study said, free care to the poor, and that cost incentives do not lead to sensible reductions. HMMMM seems opposite or what you are implying.