Sure, but that legislation is not on the table because the meat lobby wont even let people see what the inside of a slaughterhouse looks like and actually because of their lobbying power the exact opposite of what you are suggesting is true; instead of taxing meat, our tax dollars go to subsidize meat to keep it cheaper than plant based alternatives. We do actually need people to change individual habits, because the political machine has huge incentives not to change at all. Perhaps if the plant based lobby could become big enough to challenge the meat lobby we could make bigger changes, but that will require individuals making small changes in their diets first.