You are missing that value is infinite, because we live in a process. Price is basically measured with supply-demand. When people get x money every month they want to spend it and that causes someone to sell for that same currency, which will create markets for that currency. Amount of money does not excactly measure a value, for example in a current FIAT-system money is just printed all the time, and still some goverments have been struggling with devalvation. If people don't spend then money becomes more spare regardless of amount of it, decreasing supply with same demand will obviously cause a devalvation.