My analogy is an automotive one. Should you bring your car in for a repair to a bent fender and paint job, when you came back and found it painted...but the fender still bent, I doubt that the garage claiming the fender was straight would be a reason for you to pay full price.
Yet...in education the mere fact that the school system says it has achieved a grade X level is enough to take your tax dollar. It is a very well documented fact that the exit level high school students are NOT reading at the stated grade level.
Why do we pay for alleged accomplishment? What value does a false claim have?