Theoretically, credit should be used for one thing: to make more money. (not less) However, instead of using it to buy or construct a machine to triple what you can produce in an hour, the average person is using it to delay having to work that hour at all, in exchange for having to work an hour and six minutes sometime later. At some point, you run out of hours available and the house of cards collapses. i.e., credi…
As long as inflation is higher than the interest rate, it means having to work less than an hour in total.
(But it's unsustainable in the long run ...)