"Physical disability hinders the quality of life an individual, no matter whether in the developed or developing country."
There speaks a non-disabled person. Speaking as a wheelchair user, my disability doesn't limit me, what limits me is the failure of society to provide for my access needs. The Social Model of Disability defines disability as the discrimination we face due to the failure of society to provide the accommodations we need as disabled people.
That's something that needs to be embedded right at the base of this system's conception of disability: Disability isn't a problem, disabled people aren't the issue, the problem is whether society is taking the measures needed to ensure disabled people can participate in life as equals. And of course there is the fundamental mantra of disabled rights: "Nothing for us, without us."