You’re imagining every firm gets 2% savings every year. That isn’t how it works.
Most firms have rising real wages: real wages rose during the 2% inflation period.
But sometimes a firm needs to lower costs. Having a small bit of inflation lets a firm do so without either firing people or actually cutting nominal wages.
There is no consistent "2%" inflation period. If a year were to have 6.5% inflation (like with year 2022-2023), most firms will not raise real wages to match it. Over the last decade we've had a 2.82% average inflation rate with 4.41% variance showing how much we overshot both metrics.
Most firms have rising real wages: real wages rose during the 2% inflation period.
But sometimes a firm needs to lower costs. Having a small bit of inflation lets a firm do so without either firing people or actually cutting nominal wages.