The truth about student loan repayment schedules is that they are not followed. Life & reality gets in the way of ideal repayment plans. This leads debtors to making minimum payments allowed which results in growth of principle because the minimum payments are inadequate to cover the new interest.
I disagree that an income of $278,000 is needed to cover a $2,000 a month loan payment. It can be done on an income of $90,000 per year ($7,500) per month. Most jobs for new college grads pay in the range of $50,000 to $60,000 per year–sometimes less.
Your total debt for an undergraduate degree should not exceed $50,000. Total. And even this amount will adversely affect one’s life & lifestyle for many years after college.