One of my ideas for slowing the rate of meat consumption: You may only buy meat if you are under the age of 18, or you have a Meat Medallion.
Medallions are obtained by successfully killing an animal over the size of a rat, on your own, with only close-ranged weaponry.
That put you off? Good! It should! Some people would still stomach it.
Infinite. Whatever you can afford with your wallet.
The point being only people who have one may buy it in restaurants/etc.