Doc, it hurts when I do this...
"Then don't do that."
Yes, the government's response to data that shows that students at charter schools do worse on standardized tests than students at public schools is... to stop collecting data on charter schools. One official is quoted: "There is nothing sinister or untoward about this."
You don't like the answer, stop asking the question. I guess it is true: Ignorance is Bliss.