I've seen people residing here forever and people returning back immediately after they graduate. I've seen people not wanting to go back, not even a single time and people who got stuck here forever. I've seen people always wondering about their family, friends out there in Nepal and working hard for them to live easy out there. I've seen people couldn't really survive here, failied and go back. I've seen people who did very well, lived a comfort and respected life and yet went back after a while.  People have their own reasons to stay or go back. I or you cannot just blame anybody and come up with own reasons.