Programmer: We computer programmers at Mytheco are demanding raises to make our average salary comparable with that of the technical writers here who receive, on average, 20 percent more in salary and benefits than we do.
Programmer's argument
The 20% pay difference (writers earn more) is unfair and intolerable.
Executive's argument
Salary is tied to seniority, and many writers have more seniority than many programmers, so the difference is acceptable.
Evaluate
The executive's defense relies on writers being more senior on average than programmers. But "many writers have more seniority than many programmers" is weaker than it sounds — it's consistent with writers and programmers having similar average seniority, or even programmers being more senior on average. To know whether the seniority-based pay system actually justifies a 20% gap, we need to know how the average seniority of the two groups compares.
Goal
Find the answer that targets this comparison: the average seniority of programmers versus the average seniority of technical writers.