There are multiple cases each year in which poor Pakistanis come for medical treatment and the doctor or the hospital waive their professional fee (they charge only for what products they have to use in the procedure).
So yes, it is an industry and a multi-billion dollar one at that where people from all over the globe come, but there are also cases each year when Pakistanis are given aid on humanitarian grounds by charity organization or by the doctor/hospital themselves.
I mention Pakistanis here specifically because for some reason, its the Pakistanis who get the majority of the aid(financial or organs), possibly because most Pakistani cases involve their children ( as opposed to Kazaks or say Iranians who come to get themselves treated) or possible because aiding a Pakistani is more newsworthy.
Whatever be the case, Pakistanis get the majority of the aid, Afghans the next.