I am sure a lot of people are motivated by the much more modern western culture as well but I can assure you that money is the motivation for the majority, as condescending as that sounds.
When I did Google Summer of Code in my freshman year in college I got paid $5500 for three months' work, which when converted to INR was more than my father was making in a whole year working fulltime.
Rs 1 million (ballpark figure) is considered to be a good salary for an average software engineer in India. By PPP conversion this is only equivalent to $57k, which is less than half of what some freshers make in the Bay Area or NYC.
Other factors which contribute to holding back the country are: illiteracy, population explosion, blind faith, diversity used against the masses to incite hate and so on.