I don't think that this really fits into my analogy, but if losing a few good teachers is the price we need to pay for preventing a toxic culture of no-accountability where administrators are not allowed to make metrics-based decisions then so be it.
If you have the wrong metrics, you cannot make the right decisions. If you are throwing away good teachers because the rest are really good at gaming the tests then you have done far more harm than good.
The analysis shows that the test results contain zero information, unless you believe that teachers change quality randomly every year. If correlation begins to appear in those evaluations, it will be because the test has been gamed.
