One thing I like about China's education system is the Gaokao entrance exams for universities. It doesn't matter if you're rich, poor, ugly, or beautiful. All it matters is how you score. It's as meritocratic as education can be.
Don’t wealthier families hire tutors to prepare their children? That’s what happens in the US with the SAT/ACT. I think you’d need free, universal SAT tutoring available to everyone in order to be more meritocratic.
Effect of tutoring is greatly overstated.