Check out what David Coleman, President of the College Board (who announced an overhaul of the SAT recently), said recently about testing and inequality:
"It may not be our fault, but it is our problem."
Leadership looks past blame (finding fault) and dives into problem solving. While someone else is busy pointing fingers, leadership gets to work fixing what's wrong.
When you find yourself trying to assign blame, stop. There will be time for that once you've done the work required to make it right.