No I do not come from a rich family. I come from a middle class or a lower middle class family. When I was born for example all we had in the house for transportation was my mom's bicycle lol. My dad bought his first car when he was 55. So no, not rich by any means. And you did not call anything last week, whatever are you even talking about lol.
But I did well in school, scored high in GMAT, got scholarships in school and then jobs and then saved up when I moved. This is how most immigrants are.
As far as earning potential goes, you should look at purchasing power parity. My salary in India when I was working was approx. Rs. 1,500,000 (15 years ago) or $30,000 USD (per the exchange rate at that time) which was equal to $65,000 USD approx in PPP, which at that time was greater than the US median income. In the US, my very first salary was 150,000 USD, and this was after my MBA. An equivalent PPP salary in India is Rs. 35,00,000, or $55000 USD which is more or less what a top MBA graduate would earn in India.
So yes in absolute terms you'd earn more, but if you consider cost of living, purchasing power etc, you'd more or less earn the same thing. I mean heck in Canada I think am poorer than I was in India. The reason you come to the US or Canada is what you get beyond money. Anyone who solely prioritizes money will be very dissappointed.
India's or the US GDP increase is also not because of labour being exploited. What does that even mean? How did you draw that conclusion and based on what data? Not saying labour is never exploited but exploitation of labour is not an economic growth driver. Innovation, human capital etc are.