1. The salaries they typically offer in India are even less. But I sympathise with you, you aren't wrong. I don't know if there's a way out of such mess, I wish there was.
2. I could be wrong but a lot of people especially in Northern India belt are brainwashed to think their language (Hindi) is the best language in the world and treat it as a matter of ego. They even undermine other Indian languages and people who prefer English.
3. eye-teration and eeteration are both right I think. Aloo-minyum vs Alyu-miniyum.
4. I don't know what an OPT is, but I'm going to assume you mean students/immigrants. It's just about attraction of life of luxury in the US imho. For an Indian, there are pluses and minuses of moving to US. Losing friends and family, Lower cost of medical expenses, costs and availability of hiring housemaids, quality of (homemade) food - especially for vegetarians are some of the things much better in India than the US for example.