Earlier quoted context omitted.
But debt and interest are both sound concepts, and both are critical towards building an advanced society. Being able to borrow money from the future is enormously powerful.
All forms of exploitation are incredibly valuable for those with the power to benefit from them.
Even debt like student loans, which gets almost universally panned, is still good debt. The ROI on a collage education is ~1000% (amount borrowed/paid off vs. increased lifetime earnings). On paper your are still dumb to not take out student loans to get a degree.