The only way to get what you want is to physically save the goods and services you want to buy in the future, but obviously that is impractical. Hence, society, markets, money, and inflation or deflation to balance the supply and demand of goods and services.

Imagine a world where everyone is your age. You and everyone around you works and is productive. You're saving money. Then, you all retire around the same time. What value does that money have? You all have money, but there's nothing to buy with it. This is obviously an extreme example. But what you want is also extreme: that population and productivity are constant over time.