Why do other governments not care that their own people leave in mass numbers?

I never understand this. You will have large migrations of people leaving places like China, Africa, the middle east, and Latin America and coming to the U. S. or Europe, and those other countries' governments don't seem bothered that their own people are leaving to find something better. Why is that? Why do they not feel that it should be a message to them of how badly they're running a country that their own people are leaving in large numbers? Or are they happy that they can get rid of a portion of their population?

By no means am I saying that U. S. or Europe are perfect - we definitely have slimy shit and a slimy gov, but at least we're not oppressing people religiously to the point of murder, leaving people with NO health insurance programs, or feeding people fake food like in China.

Why do other governments not care that their own people leave in mass numbers?
Why do other governments not care that their own people leave in mass numbers?
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