I’d also make the argument that restricting migration out of a country can be of benefit to that countries economy. This was the case with South Korea after its civil war:
It's unfortunate you're being downvoted. I highly recommend the book, Bad Samaritans [1] as it shows that all developed countries followed a similar pattern of IP theft and protectionism.
https://www.amazon.com/Bad-Samaritans-Secret-History-Capital...
The books author is a Korean economist who grew up during this period. One point that he makes which is very interesting is that South Korea had very strict laws preventing its academics from migrating to other countries. Those that did travel abroad to study were forced to return and participate in the economic development of the country. He attributes this as part of the reason for South Korea’s turn around.
China is another economic success story that restricts its citizens movements. Not saying that I agree with either of these policies. Just bringing them up as eastern counterpoints to the notion that unlimited free trade and free movement are the optimal states for economic development.
1. https://www.amazon.com/Bad-Samaritans-Secret-History-Capital...
* Twenty-Three Things They Don't Tell You about Capitalism [1]
* Bad Samaritans: The Myth of Free Trade and the Secret History of Capitalism [2]
[1] https://www.amazon.com/Things-They-Dont-About-Capitalism/dp/...
[2] https://www.amazon.com/Bad-Samaritans-Secret-History-Capital...