Replace a system? I’m talking about keeping the one we already have, more or less. If you want to get schools to stop looking at essays/rec letters/resume/interviews, you need to come up with an argument for why those things are less meaningful.
And it’s true that any system can be gamed, but that includes test scores. I teach English at a highly competitive academic magnet. I blended focused SAT prep into the English curriculum and in two years took our average score up 190 points–which was possible because my mostly poor and almost all minority students had, for the most part, not had the advantage of formal SAT prep. The kids three years ago were not less prepared for college, but they had lower scores.
They show a difference, but it’s not clear what the relationship that difference is to the ability to take advantage of educational opportunities. It’s especially not clear what the difference is at the upper ends of the range–I’ve taught a lot of high scoring kids, and there’s a difference between a kid who scores 1950 and a kid that scores 2310, but it’s not a difference that maps neatly onto “the skills you need to be successful in college”. On the old test, the difference in that range was knowing obscure vocabulary and being able to read a little more quickly (and possibly being a little better at seeing efficient ways to solve problems in math/less prone to careless error).*
Honestly, I think the gap between racial/ethnic groups at selective schools is less that schools are taking black/Hispanic kids who can’t hack it and more that they have so many high scoring white applicants that they are using it as an almost arbitrary filter for that group. Somewhere like Stanford could put in a ceiling–we aren’t going to take anyone with over a 2000–and STILL have enough talented, qualified applicants to make up a class as successful, as talented, as prepared as the one they have now.
*The new SAT is a much better test, I think, and may do a better job, but it’s still problematic.