While you are welcome to disagree, it is much easier to develop teaching and funding policies when the population is small and homogeneous.  The US is huge and ed funding and results vary widely.  I remember a study I was hired to do for a state that was being challenged in court over funding disparities.  The highest spent by the state per pupil was in a wealthy neighborhood (at $3,001.00) and the lowest in a poor one at $2.11).  In the US, public ed funding is set by politicians who aren't always interested in fairness.