Exactly. We currently have a government imposed education ceiling. That's one of the best lines I've ever heard supporting education choice! 

If you can only afford to live in Mt View or Airport Heights your kids are sentenced to their low-performing government assigned school with no other choices. In those schools, you have a 60-70% chance your kid will not read or do math at grade level and will do poorly after they leave elementary school.  Those schools have ZERO incentive to innovate or improve because they know the kids and the dollars they represent will return every year regardless of performance-- they don't have any other choice. 

Government imposed education ceiling. Thanks. I'm going to use that.