I have heard that most of the rich Muslims in India, and many middle-class ones, migrated to Pakistan in 1947. But among the poor, only a small number were able to migrate. As a result, in the post-Independence India, a disproportionately large number of Muslims were poor. However, I believe this is only true for areas near the border. For people who lived far away from the border, it was difficult to emigrate, and so most of the stayed put. For example, Azim Premji, India's richest Muslim, is from Hyderabad, which is far from the India-Pakistan border.
However, it is also true that there is some discrimination against Muslims in India. I've seen it first-hand (I'm nominally a Hindu). However, you probably hear an exaggerated version of it in Pakistan. And, we non-muslim Indians also discriminate against each other: rich vs poor, north Indians vs south Indians, native people of a state vs people from out-of-state, etc. So, the experience is not unique to Muslims.
Please see this: http://en.wikipedia.org/wiki/Hacker_%28programmer_subculture...