Apollo
VIP
It’s a fair trade off. Those skilled minds want the resources and the atmosphere of the country they want to immigrate to, and the host country wants their intellectual property. How’s that immoral when it’s mutually beneficial, especially since they don’t have the framework to get far in benefiting their home countries?
It's not extremely immoral, but morally questionable, especially from a macro perspective.
I'm of the opinion that intelligence has a strong genetic component (while also being influenced by environment but still largely innate) and if this is true then depleting the gifted of the third world it will leave them worse off long-term.
Many Western countries more or less correct this by also taking in large numbers of unskilled people (refugees, unskilled agricultural workers). So it's a mixed bag. If the West were to completely halt unskilled migration and only mine the gifted of the third world I would call that immoral.