What I don't get is, why don't they make a study on how first world countries do it, see which ones are having trouble, see which ones are thriving (France I th

What I don't get is, why don't they make a study on how first world countries do it, see which ones are having trouble, see which ones are thriving (France I think), implement trials in a few states, see what's what, then go from there. Bill Gates' opinion on this shouldn't matter.