These kids (huge majority from upper castes) are treated with too much deference at home by the parents, family and society. Since they are served well at home by servants and society when they go to foreign lands their expectations don’t change and they take the baggage with them. Mind you, they’re modulating the behavior a bit abroad because at home it’s even more pronounced.
And while SV is taken by DEI there are more than a few companies that lean very heavily to one foreign ethnicity to the exclusion of others. It’s an amusing contrast of signaling vs reality.
On the other hand, I’ve worked with nice ‘regular guys’ (from India) who had sloughed off any trappings of caste don’t have pretensions and they are a pleasure to work with and indeed contribute to our society.