She goes back into debt right after.

In her youth, she didn't make much. She has since become a skilled professional though and now makes a very good salary.

She is still in debt.

I have friends who make mind boggling amounts of money and also have amazing debt. As they have made more their debt has gotten worse, not better.

A credit score says whether or not you have paid back your debts. Making more money does not fix the broken behavior - it often times makes it worse.