Your model of supporters of farm animal welfare seems super wrong to me.
I would predict that actually supporters of the law will be more unhappy the more effect it has on the actual market, because that reveals info about how bad conditions are for farm animals. In particular if it means shifting pork distribution elsewhere, that means less reduction in pig torture and also fewer options to shift consumption patterns toward more humanely raised meat on the margins.
Those costs can be worth paying, if you still expect some reduction in pig torture, but obviously writing laws to be better defined and easier to measure would be a further improvement.
Your model of supporters of farm animal welfare seems super wrong to me.
I would predict that actually supporters of the law will be more unhappy the more effect it has on the actual market, because that reveals info about how bad conditions are for farm animals. In particular if it means shifting pork distribution elsewhere, that means less reduction in pig torture and also fewer options to shift consumption patterns toward more humanely raised meat on the margins.
Those costs can be worth paying, if you still expect some reduction in pig torture, but obviously writing laws to be better defined and easier to measure would be a further improvement.