> Farmers get a pass since they are producing things on the land. And the people who maintain farmers' equipment? Purchasers of farmers' goods? The people wh

> Farmers get a pass since they are producing things on the land. And the people who maintain farmers' equipment? Purchasers of farmers' goods? The people who sell food to farmers? The people who maintain infrastructure? Mail? Which is to say, where there are farmers (or ranchers etc), there is a whole city nearby who supports them. And cities imply infrastructure - like roads.