If the SAT correlates too strongly with wealth, then Collegeboard should make a better test. Make one that changes significantly every year so direct test-prep is hard. Choose different types of critical reading passages and questions each year, vary the style of the math questions - make the test different enough each time so studying past tests isn't valuable. Then, if you eliminate the advantage direct prep gives, the correlation to wealth should weaken, and the test should get closer to measuring aptitude.
But instead, Collegeboard continues to shoehorn political objectives into an already broken exam. This is a mistake.