Because IQ tests are standardised rigorous tests. 145 are three effin standard deviations up, where 130 means 99th percentile. 145 is 99.9. There simply are not

Because IQ tests are standardised rigorous tests. 145 are three effin standard deviations up, where 130 means 99th percentile. 145 is 99.9. There simply are not enough people up there to make reliable tests. WAIS (the most used one) breaks down around 135.