Is it really broken?

Our schools in this country are supposedly failing, right? Kids aren't being made ready for the "Globalized" 21st Century, and such. If that is truly the case in nearly every district, town, city, county, and state throughout the Union, then the problem is not our teachers, students, or their parents. The SYSTEM is broken! So many folks say this is the way stuff is going down- that "the system is broken." I, for one, don't buy it. I think it is working perfectly.
Sounds crazy, right? Think about this: If I can walk into any school in the United States of America, look at the demographics (class, ethnicity, race, religion, gender breakdown, etc.) and with accuracy (+80%) predict which groups of students will succeed and which will fail (as a percentage) then there are forces at work here that prove the system is working exactly as it is supposed to; the system is not broken and is instead running smoothly.
It's like this: go to a light switch and flip it up. What happens? The lights turn on. If you push the switch down, the lights turn off. A system is defined by its predictability; the light switch is a very basic system because it has a reliable set of predictabilities inherent in its function.
Coming back to education- if I can look at the data and predict what is going to happen to any number of the demographic groups, then the educational system is working like it is supposed to. It is not failing. Our students are not failing. Our teachers are not failing. They're all being set up to fail by a system that is INTENDED to disprivilege certain segments of the population while affording unearned privilege upon the lives of others. So I feel the system is working perfectly. It is not fair, but the people in charge are getting exactly what they want- which the rest of us pay for. Bastards.