My last interview was with a big 4 and every single one of my interviewers was from a different country (China, India, somewhere in Eastern Europe). I bring that up only because I know they grew up there and didn't study in the US, so they probably weren't as privileged as me or you.
I wouldn't read too much about class into it. Prestige (of college, other places you've worked) is definitely important for getting the interviews, but it's at best only a proxy for wealth, and it doesn't help you navigate the interviews themselves IMO.
I'm not really sure how exactly you think SES/class plays into big 4 interviews, honestly. At my interviews my interviewers were mostly wearing jacket+tshirt+jeans, most of the other interviewers were wearing about the same thing, and I wore sweater+collared shirt+khakis, which was also fine (I got the job). The only time SES came up is when I brought up how my background coming from a more rural/poorer area could help me provide unique perspectives about users and how they might interpret the products that I contribute to.
I wouldn't read too much about class into it. Prestige (of college, other places you've worked) is definitely important for getting the interviews, but it's at best only a proxy for wealth, and it doesn't help you navigate the interviews themselves IMO.
I'm not really sure how exactly you think SES/class plays into big 4 interviews, honestly. At my interviews my interviewers were mostly wearing jacket+tshirt+jeans, most of the other interviewers were wearing about the same thing, and I wore sweater+collared shirt+khakis, which was also fine (I got the job). The only time SES came up is when I brought up how my background coming from a more rural/poorer area could help me provide unique perspectives about users and how they might interpret the products that I contribute to.