The prices of true essentials are exceedingly small. Essential is something like sharing a room with someone, eating rice beans frozen veg mix (ie very inexpensively), wearing clothes from thrift stores, exercising outside and using a library card, medicaid. Everything beyond that is, technically, optional.
Having wealth aiding the overall return doesn't negate my point. Using wealth to get an unjust return does. An example of a better return would be hiring a financial advisor that (somehow) creates better returns using smarter allocations. An example of an unjust return would be creating a monopoly, buying a politician, or extracting profits from unpriced externalities (pollution and bailouts to name a couple). (These do happen in the USA, and I'm all for ending them!)
There's nothing unjust about someone getting more returns on more invested, this will naturally lead to a widening wealth gap over time. It's an inherent property of existence that more invested yields more return yields yet more invested (accelerating).
I do, however, like Scott Galloway's point that we need to find new ways to get the rich to spend their money, we need the poor to start 10000 businesses that gratify the rich and extract their money. Right now they're mostly accumulating it and bidding up investible assets (eg look athe P/E multiple of the S&P 500) .