Authors:

People of the same trade seldom meet together, even for merriment and diversion, but the conversation ends in a conspiracy against the public, or in some contrivance to raise prices.

An Inquiry into the Nature and Causes of the Wealth of Nations vol. 1, bk. 1, ch. 10 (1776)
People of the same trade seldom meet together, even for merriment and diversion, but the conversation ends in a conspiracy against the public, or in some contrivance to raise prices.