The old-money white South African kleptocracy have plenty stashed away overseas; Anglos usually have some family connection to get them to the UK or Australia; the biggest losers will be the Boers - after 300+ years in Africa they have nowhere else to go.
If all of the US became like Chicago - or Detroit - where would you and your family go? What country would let you in?
One problem with the trend, is that it is unsustainable. The global foreign-aid welfare state needs Western taxpayers to hold it all up, and there are too many parasites for their hosts to support. Western taxpayers are getting increasingly restless.