They’re slowly gonna make the currency worth as little as they can without causing the foreigners to dump their treasury instruments en masse. If they can devalue by 50%, voila they owe 50% as much money as they used to. By hiding real inflation behind a bogus CPI value they keep interest rates low while running the presses 24/7 and deflating the value. It’s brilliant! Unless of course you have your money in dollars and then it sucks. But of course Americans have debt not dollars so it’s good for them!