The prosecution wants to introduce the pay rates of various military grades. Why? They want to say Bradley stole something, and the something was worth over $1000 dollars, and hey buddy that's felony territory. You are in big trouble now. Using the labor theory of value, they want to say that data cost x hours at y dollars per hour to create, and x times y is $102,000. Guilty.
Yes, there is a difference between stealing a baseball and stealing a baseball signed by the New York Yankees; namely the replacement cost is higher. But Bradley did not steal the data in that sense; it is closer to copyright violation type of stealing. And the value of a pirated copy of Michael Jackson's Black or White CD does not depend on the pay rates of the studio musicians.
Ellsberg at least stole copy paper.