I live in a world where you can't bend math, that's it!
If you have 100k sitting in a bank and you get 5% interest rate in 10 years you're going to have 162k
If a thing costs 100k and you have an inflation of 7% in 10 years that will cost 196k.
So, in order to buy now the thing you could afford with your money 10 years ago you will have to cough up another 34k.
And in no world does this end otherwise!
Don't forget about bank charge, withdrawal limit, freeze funds, and you can't withdraw all of your money, which will make you can't get all of your $162K.
Bank interest can't beat inflation because when the bank need to pay the interest amount, they need to print new money which will increase the inflation rate. Bank is smart enough since it make people willing to put their money on bank because they feel there's no reason to hold it alone or put in piggy bank since they wouldn't earn any interest. That's why middle and poor people always lose their money and they can't change their life.