What I do not get is why you think this way. People are simply trying to improve their chances by studying and trying to get a better SAT. It baffles me that you think this is somehow corrupt.
Your point seems to be that poor people cannot prepare for the SAT because they do not have the resources. I agree, but I think you should instead focus on fixing poverty. How? I have no idea.
You cannot stop people from studying or preparing themselves to have an advantage over everybody else, that is just crazy thinking.