My point is, you can't eat money. You can only exchange money for food. You can't heat your home with money. You can only pay for energy. You can't drive with money… well you get the idea.
So you're saving now so you can retire later. From an accounting perspective, sure, you increase a number there now, so you can decrease it later. What you cannot do is store actual food for several decades, accumulate enough energy for several decades, or store all the material you'll need several decades from now.
What you'll eat 20-30 years from now will not be taken from the current economy, it will be taken from the economy we'll have 20-30 years in the future. If there's no food there you will not eat, and that's the end of it. Maybe you'll have your money all right, but food will just have become too expensive for you to buy enough of it. (Now I talk at the individual level, but this is obviously a scale thing: some people will eat all right, just not everyone.)
Hence my argument that even capital markets ultimately are a form of redistribution. Because at some point, either the young work so the old can enjoy retirement, or we leave the old to fend for themselves. Or something between the two ends of that spectrum.