The problem is that you can only make use of loopholes if you are large enough. You need foreign entities, an army of lawyers, etc. Consequently, rich companies

The problem is that you can only make use of loopholes if you are large enough. You need foreign entities, an army of lawyers, etc. Consequently, rich companies can use loopholes, but the smaller local companies that they are competing with cannot use the same loopholes. Secondly, you would be surprised, there enough people who don't deduct everything possible. There are also enough people who don't take the cheapest energy, but choose a green option instead. Who don't buy the cheapest meat, but go for more expensive non-factory farm meat. Who don't take a plane, but take a train. Etc. (Before someone starts to criticise green energy, bio meat, etc., that's not the point: people are willing to spend more for a more ethnical lifestyle. Why shouldn't we expect the same from a company that always talks about its ethical virtues?)