CC interest is high because: 
1. Most people pay off the balance each month; the people who don&#x27;t _really_ need the credit.
2. The default rate of those people is probably (very) high. Given a default means a bank loses their capital, they need to make it back somehow.<p>Also, a student loan with 12% interest? If the loan still carries a significant balance, she should refinance at a much lower interest rate (pledge some collateral if you have to, like a car&#x2F;house&#x2F;existing share portfolio).