In 1977, David Ogilvy, the man often cited as the father of modern advertising, published a set of observations that would eventually challenge the fundamental accounting of the professional services world. In Confessions of an Advertising Man, Ogilvy noted a peculiar misalignment in how agencies billed their clients. The industry standard was a commission-based model, effectively rewarding agencies for spending as much of the client’s money as possible on media placements, regardless of whether those placements moved the needle on sales. Ogilvy argued for a system tied to the commercial effectiveness of the work. He wanted to be paid for the revenue he generated, not the hours his staff spent sitting in mahogany-row offices.

The tension Ogilvy identified remains the central friction point for modern consultants, lawyers, and creative professionals. Most service providers operate on a cost-plus basis, where the "cost" is their time and the "plus" is their margin. In this model, the professional’s primary inventory is the hour. However, as a practitioner gains expertise, they become more efficient, solving in sixty minutes what once took sixty hours. Under an hourly regime, the reward for this increased proficiency is a smaller invoice. It is a structural paradox where the most skilled individuals are financially penalized for their own mastery.