I have yet to meet an Indian in UK who has said he is going back, neither I know of one who has and I am talking about having lived in UK for nearly 40 years. So stop pulling arguments out of thin air.
I am talking about professional Indians, most of whom choose to move to the US (not UK). I am comparing those Indians with their similarly educated Pakistani counterparts.
The ones in UK are mostly the shopkeeper/cabdriver variety. Maybe you need to start interacting with some educated Indians ;)