I think a lot of middle class people roll over their debt, too, no? Say buying a new car when the warranty expires on the old car. Or buying a new house every 10 years (US average).

But I don't feel like digging around SCF data, so this is just a hunch. Having said that, my hunch is that middle class households are much more indebted than wealthy households.

I think an easy argument can be made that the standard home and car loans are the same. In spirit, payday loans are exactly the same.

Difference is just the volume of money and when the term is due.