An adopted son of a Doctor would attend university at the minimum. There is no way that he will drive a taxi.
I live overseas from some years and most people who drive taxi are not exactly qualified. Some will say that their degrees are not recognized etc etc. Most of the taxi drivers are actually refugees and people who entered on some shady visa. The earnings of a taxi driver is only slightly more than an entry level technician. A call centre tech would make 35K NZ$ and a taxi driver makes like 50k NZ$. But in the second year the gap closes but another 10K and by third year it is totally gone.