The reasons for brain drain are many. Lack of opportunities in the mother land, lack of motivation from the government and lack of facilities in the country. The government should think about this brain drain and has to see how to contain this.
" Be Good and Do Good "
Encouraging Indians to Emigrate would be difficult in the present context as many countries are restrict expect healthcare to some extent. It would be improper not to regulate our own population growth and send to them some other country to ease the pressure of land.
"Do not give up, things might not favour you always"
So what we now fear is the re-flow or permanent return of those who migrated already . Added to this down scaling of further migration also will cause issues here. One of the solutions is to sincerely and urgently implement the Make -in-India concept work . Government should incentivise production ventures here. People should voluntarily resist and avoid imported goods and products if the same product is manufactured in our own country. The government cannot do the boycott due to international agreements.
The party is now going to be over soon. Acceptance is less outside, salaries are being pruned, local resistance is increasing, new and more local legislations are coming in those countries disfavouring outsiders, life is becoming less peaceful in countries which were once thought to be safe. Due to all these reasons emigration will automatically reduce.
So the title question may soon become irrelevant.