Inflation makes people walk to the bank more often, and that walking is a real cost
When inflation erodes the value of cash sitting idle, people respond by holding less of it and making more frequent trips to deposit and withdraw money instead, literally wearing out shoe leather, economists' term for any inflation cost from avoiding cash rather than from prices themselves. Economist Martin Bailey formalised the idea in 1956, showing moderate, fully anticipated inflation imposes real economic waste purely through the extra transactions it forces on everyone.