For example, a physician is a person of two faces. One face is a medical one. Another face is a private business. The faces are in conflict. He is forced to buy a medical procedure without bargain.
Alternative thought is directed to create the bargain.
A lawyer has two faces as well. One face concerns a law. Another face is his private business 'by the same law'. So, copying legal papers is a good 'invisible' business, 'by law'. It could be the deal against inflation.