I always found it funny that Canadians score better (before normalization) on the WAIS IQ test than Americans even though the WAIS is an American test with some

I always found it funny that Canadians score better (before normalization) on the WAIS IQ test than Americans even though the WAIS is an American test with some American history knowledge questions and American notation/units in the questions. Canada doesn't actually have their own IQ test afaik, they just use the WAIS and renormalize. I'll never understand why US politicians don't strive to close this gap or many others when the two countries are otherwise very similar.