1. Savings lose value
Cash in the bank grows slower than prices rise, so it buys less later.
2. Spend now mindset
People buy today because waiting usually means higher prices.
3. Money shifts to other assets
Many move cash into gold, property, or foreign currency to protect value.
4. Less to save
Bills go up faster than wages, so there’s less leftover at month-end.
Why do bank pay back less when inflation gets high? Why they do not increase the pay back percentage with time?
What you people usually do with the money instead of saving it during inflation?
What are you talking about in your second point? Buying what? Are you talking about Bitcoin or something else? If you are talking about Bitcoin, then how can one buy or even save when the prices of goods or any other thing are already high, and the money in such a case is not sufficient to manage daily or monthly expenses? But yes, overall, if we look at those people who earn good revenue per month, then this is a good question for those who don't, because they can save even in higher inflation cases.
Other than this, banks don't care about you because they care more about making their own empire and network strong. They use our money to invest further, and in this way, they generate a lot of profit from multiple businesses. That is why I really hate the centralized and traditional banking system.