Actually it was 1974. I went to a university with many overseas students, lots from the Middle East, India, Pakistan and South America. Clearly my experience was different, but I can assure you that the middle class ones stuck together and us working class kids did too. I really can't believe that you can't tell a person's social class by how they speak, or the clothes and possessions they have, or comments about what mummy and daddy did for a living. Even, in those days, whether there was a phone at home, now it would be how much those possessions cost, but it's still there. It was what you did in the summer holidays; for me, it was working in the cardboard box factory or looking after the children of better off parents, for the rich students, it was going on holiday to an exotic location. I had to earn money, so my dad could keep me in the long holiday.
After graduation those with money got better jobs because daddy knew someone; for me, it was grabbing anything going as, believe it or not there was no chance of my dad subbing me.
Your experience may be different, but it doesn't make mine any less valid. It happened, and I was aware that I was worse off financially.