Plenty of extremely poor Chinese immigrants scrimp and save every penny to pay for top notch tutoring for their children. This isn't really about wealth, it's about culture and ability.
I half agree. Chinese immigrants strongly value education, and on average, have more inherent ability. So many overcome the disadvantage of being poor. That doesn't mean that the average poor kid isn't at a disadvantage, and that the smart poor kid is hurt by removing advanced math courses. That smart poor kid may not be getting the support at home like a Chinese immigrant, so support at school is all they are going to get.
Why not send them to private school then? Or is top-notch tutoring only available outside of a traditional school? In which case, why have a traditional school model at all?