Indeed, with 10% return and 10% inflation, the deposit is not giving you any real return net of inflation, which is why you can buy only 2,000 dosas after a year of investing, the same as you could buy before you invested.
In contrast, when inflation is 5.5% but the interest rate you are getting is 8%, you are earning a real rate of 2.5%, which means 2.5% more dosas. So while I sympathize with pensioners, they certainly are better off today than in the past. Let us turn to the industrialist.