economic migration is an important part of the Nepalese economy , depending upon their skill  people go abroad india, middle east, honkong,  australia, europe, u.k , north america. This is because Nepal has very little to offer and there are no jobs.
Going back to nepal and singing songs of nationalism will not help. if you send money  or start a business that will help Nepal.
I don't see how going back will help Nepal it will just add to the unemployment and one more frastu.