I think you're missing the point. The sheer volume of people, our cutthroat, materialistic culture, poverty and intrinsic desire of hopefuls to "escape" to a rosier place makes the Indian population perfect for this kind of fraud. And of course, there are plenty of well-off NRI Indians willing to sell them the dream of moving to the west.
Even our pop stars were at it: https://www.google.co.in/amp/s/www.bbc.com/news/amp/world-as...