Yes, it's quite problematic. First, it's obviously not a fair measure; tax contributed is not a direct reflection of education quality. Parents, background, ac

Yes, it's quite problematic. First, it's obviously not a fair measure; tax contributed is not a direct reflection of education quality. Parents, background, accidents, moving abroad... You can't possibly clean the statistics enough to get rid of all those factors. Second, it's not the business of the school to know my tax information and employment status. You can't measure something based on a number that you can't know.