I think he's actually saying: "Poor people actually do indeed have a lot of clutter. Not because they don't see how they could live simply and how that would

I think he's actually saying: "Poor people actually do indeed have a lot of clutter. Not because they don't see how they could live simply and how that would improve their outlook -- but because they have to have the clutter (the junk they've accumulated) because they might need that junk in the future, and the risk of throwing anything away is too great."