The author's concession in the text can be identified in the acknowledgment that raising the minimum wage, particularly in fast-food positions, could have significant consequences for business operations and employment. Specifically, the author concedes that if Congress mandated fast-food restaurants to pay $15 an hour, it would necessitate changes in operations to ensure that productivity aligns with the higher wage costs.
Evidence supporting this concession can be found in the statement, "If Congress mandated fast-food restaurants to pay $15 an hour, they would have to change operations to deliver the kind of productivity to justify those higher costs." This suggests that the author recognizes the potential impact of increasing the minimum wage on the fast-food industry and indicates that such a mandate could lead to a transformation in how these businesses function, including the possibility of replacing current workers with machines and hiring fewer, more skilled workers. This acknowledgment of the challenges and repercussions associated with a minimum wage increase illustrates the complexity of the issue and suggests that while higher wages may seem beneficial, they come with trade-offs that must be considered.