Perhaps you feel the same way about labor movement within the US? Have you ever moved from one county, or one US state to another for educational or career opportunities? If someone was to move from Virginia to California, would that be a case of California 'stealing'from Virginia? I think it is, in the mechanical sense of virginia loses talent and taxes, and California gains it: surely what matters though, is that the right of humans to engage in the 'pursuit of happiness' should outweigh the right of a state (including nation states) to restrict such movement.
If you accept that idea, you can still argue that the obligations of a nation state are to promote the wellbeing of its own citizens above that of non citizens, but we shouldn't pretend that the barriers we put up are some noble effort to prevent 'stealing' from poor countries: people own the right to their lives and labor, not their state or government of origin.
If you accept that idea, you can still argue that the obligations of a nation state are to promote the wellbeing of its own citizens above that of non citizens, but we shouldn't pretend that the barriers we put up are some noble effort to prevent 'stealing' from poor countries: people own the right to their lives and labor, not their state or government of origin.