Huge transfer of wealth from low-margin businesses to high-margin businesses. Supermarkets, for instance, have margins of about 3%. With a revenue tax they'd b

Huge transfer of wealth from low-margin businesses to high-margin businesses. Supermarkets, for instance, have margins of about 3%. With a revenue tax they'd be completely boned. They could raise their prices, of course. But the bigger supermarket chains would be better off buying out their own supply chain.