They pay down the loan (which will have some hilariously low interest rate because they're good for it) with income, and then - to rub salt in the wound - they

They pay down the loan (which will have some hilariously low interest rate because they're good for it) with income, and then - to rub salt in the wound - they get to write off the interest paid on their income taxes. These guys do have substantial incomes, but through "charitable donations" (to charities they control) and interest paid, they often pay little or no income tax on it.