Good question, who does appoint that panel then and make that determination? And who sets forth the criteria? Do you honestly trust some board of bureaucrats to be good at this? Apply the TSA model to organ transplantion and tell me it will work out just fine. But then again, it'll be easy to figure out for the extreme cases - 89 year old that weights 900lbs and drinks a fifth of vodka each day versus a 12 year old. But what about the harder cases? 49 year old mother of 2 and divorced once versus 47 father of one married since age 26? Do we choose to kill the mom or the dad? Hmmmm. Who's got a degree? Who makes more each year that we can tax? But wait, we need to have a study to ensure that distribution of organs is equitable across every possible hyphenated prefix we can place before the "American" identifier in one's ethnicity unless we want a crowd in the streets chanting "no justice no peace" and "hey hey ho ho there is where the catchy slogan goes". Back to the extreme cases, did I mention the 89 year old was a genius professor at an Ivy League school in their engineering department while the 12 year old has been comatose since a car accident happened 8 years ago? Maybe none of these people qualify because there's a 34 year old marathon runner that just popped up in better health than anyone else on the list. The 34 year old is also a Hollywood celeb we've loved since she was a child star on Disney. So who do we assign death then? Answer quick because Mr. Reaper is waiting. Oh, by the way, where do you factor in on the list?