Another way to frame this is that during inflationary episodes, debt became easier to repay.

My parents bought a house in the 1970s. Because of the inflation that occurred during that time, incomes and expenses rose, yet long-term debt obligations such as fixed mortgages remained unchanged; their mortgage payment was the same in year 30 as in year 1.

I guess another way to say it is that during an inflationary period, the people who HAVE money suffer the loss of its purchasing power. But the people who OWE money benefit from the dollar not being what it used to be.