Why is it obviously a good thing for some to be able to afford purchases that others cannot? Pooling resources and companies would still be a thing.

We're talking at a rate of 1000000000x in some cases but even in general what is the argument that it's obviously a good thing that few have much more purchasing power than most?

>It's not a zero sum game, after all.

No but I would argue that it's likely more beneficial to have a vibrant middle class over a few extremely wealthy individuals.