My son's Romanian 1/2 bro got a vastly superior start in life thanks to a system that can only afford to implement proper clinically evidenced teaching techniques & proven effective therapies, as opposed to the latest politicians fad. No stuck in a corner or corridor with a poorly trained TA there. Instead he had intensive ABA style tuition from age 2 - 7 with the outcome you'd expect from that level of timely, effective intervention. If he'd been of Roma origin that wouldn't have been the case though as those children are regarded as little more than dogs by their system.
In Hungary it takes 7 years to train as a teacher for children with disabilities, & then they specialise in just 2 disorders, as opposed to a 1 yr TA course here. In Nigeria there is now an ABA school and generally society has a far better attitude in terms of focusing on what a child can do, rather than spending time getting parents to "accept" their child's limitations. The goal in both places is to prepare a child to the best of everyone's ability for an independent adult life rather than assuming the welfare state will support them from cradle to grave.
I'll never be able to prove it, but anecdotal evidence in my area suggests that the children of white, middle class married mothers living in the "nicer" parts of the borough get far better treatment from the early years onwards. Those unfortunate enough to be born in the wrong postcode to a single mother of the wrong ethnic minority are more likely to have to fight for assessment, spend years "proving" their parenting skills and have to go to Tribunal to stand a chance of getting the services offered as a matter of course to the children of the first group.
All support services are physically located in the areas most easily accessible to the first group too. The effectiveness of those services is a subject for another debate.