The price of a thing is largely wages. (What proportion is wages? I guess it depends on the thing. But, say, a computer or car is mostly wages; a restaurant meal has a larger real estate component.) Anyway, if you buy a Prius, but Toyota’s workers spend their money on virgin forest furniture and dirty electrical power, have you really achieved anything at all? Does the environmental behaviour of a company’s employees matter? If your Prius is chauffeur-driven, do you need to monitor your chauffeur’s spending?