When I was at uni, a trick of the really rich kids was to take out a full private student loan, their parents would invest the money, and at the end of the course, it would be immediately paid back in full and they'd pocket the profit.
This has randomly reminded me of a girl I know at uni - she already annoyed me before but this was really the last straw. I'm at uni in Scotland, and because she's Scottish she doesn't have to pay tuition fees, just maintenance. Her parents (wealthy) pay for all of that, so she's getting through uni essentially for free. One day she comes out with: "I'm thinking of taking out a student loan". We are all shocked and concerned - has something happened at home meaning her parents can't pay any more, are they ok etc? Oh no.
Her response: "I just think it would be nice to have more money".
Us: ????????
Her: "I could use it to go on holiday more"
Us: ?????????
Her: "I was thinking around £9000 would be enough, what do you guys think"
Us: ????????
Her: "good idea right!"
This was two years ago and I still haven't fully recovered from having to sit through that conversation. I think she thought that a loan was just being given money...like for free? Like you just got money and then it was yours, no concept of paying it back (with interest). Just, a way to get more money. Even typing this it's giving me a headache to think about. The total lack of awareness of the value of money (or apparently how money works???) was astounding. I'm hyper aware of the fact that I'm absurdly lucky my parents can pay my uni fees (on the understanding that I will pay them back when I have a job, though without interest), and it blew my mind that someone could have that little comprehension of her privilege.