If wages increase with inflation, and if the borrower already owed money before the inflation occurred, the inflation benefits the borrower. This is because the borrower still owes the same amount of money, but now he or she has more money in his or her paycheck to pay off the debt. This results in less interest for the lender if the borrower uses the extra money to pay his or her debt early.
Inflation can help lenders in several ways, especially when it comes to extending new financing. First, higher prices mean that more people want credit to buy big-ticket items, especially if their wages have not increased – new customers for the lenders. On top of this, the higher prices of those items earn the lender more interest. For example, if the price of a TV goes from $1,500 to $1,600 due to inflation, the lender makes more money because 10% interest on $1,600 is more than 10% interest on $1,500. Plus, the extra $100 and all the extra interest might take more time to pay off, meaning even more profit for the lender.
Second, if prices increase, so does the cost of living. If people are spending more money to live, they have less money to satisfy their obligations (assuming their earnings haven't increased). This benefits lenders because people need more time to pay off their previous debts, allowing the lender to collect interest for a longer period. However, the situation could backfire if it results in higher default rates.