One state in India is particularly strong with its labour centric protectionism. As far as I have seen, most families' earnings come from one family member working in "Gulf". The labour unions there are a big reason why industry hardly ever takes root. One example: https://x.com/Bharatiyan108/status/1948757576427901138
The immigration route only works temporarily, of course: their children will no longer be immigrants and less likely to remain in that business. Hence why relying on immigration to keep replenishing some sector is like having anemia and living off blood transfusions. You’re effectively a vampire.