I was being handed credit cards on the street when I was a student. Just sign here and it's in the post.
I got a loan from the bank just because I was a student with absolutely no proof of income at all.
This is simple common sense. If you give me things interest free when I'm a student with no income, then you make no money off me.
If you don't sell me things which incur interest when I do have an income, you make no money off me.
It is indeed very easy to see why all our banks are on the brink of collapse.