I hope many of the study participants are living in a low COL area. If the $1000 per month covers most if not all of your expenses it gives someone a much great

I hope many of the study participants are living in a low COL area. If the $1000 per month covers most if not all of your expenses it gives someone a much greater opportunity to pursue something the can really improve their life rather than just a nice boon on top of their current income. Of course, this is more of an "I hope this improves peoples' lives" rather than considering how best to design the experiment.