Taxes on revenue create strong incentives for vertical integration and consolidation (because there are fewer links in the chain to be taxed).
If one entity owns the farm, the food distribution, and the grocery store, they have one revenue transaction to be taxed. A small farmer selling their eggs to a distributor who sells them to the grocer who sells them to you is taxed three times on what amounts to same activity.
If one entity owns the farm, the food distribution, and the grocery store, they have one revenue transaction to be taxed. A small farmer selling their eggs to a distributor who sells them to the grocer who sells them to you is taxed three times on what amounts to same activity.