[bombcar]

As implied in another comment, the real solution is one people don't want to consider - forbid people from taking debt on in certain circumstances.

But this immediately appears as "unfair" even if predatory lending is a huge problem.

Meanwhile those who already have some money wouldn't be affected by it much, for example, a law requiring all credit cards that charge interest on balances to be secured ones (where if you have a $1k credit line you must have $1k cash/cash equivalent in the bank).