Isn't 95% of every resource use "sub-optimal"?
Everyone goes to holidays or buys stuff they do not need. Bezos is just rich enough so that his spending goes into the news.
Depends:
> If we suppose that the goal of society is to produce the greatest utility, and that the utility wealth provides an individual is sub-linear (i.e. twice as much money makes you less than twice as happy), then inequality is inefficient resource allocation.
> However, we also suppose that some level of inequality can lead to greater productivity, and thus greater utility overall. The question is then what level produces the best outcome?
* https://news.ycombinator.com/item?id=14505342
At want point is the cut-off in the diminishing returns of utility/happiness?
500m dollar yacht seems like a good place to start, we can work our way back from there.
I'm not a fan of Elon Musk, but I feel much less negative about his ventures than about Bezos, simply because they are adding to the world of what is possible. Bezos' rockets seem like a "me too" thing. People often say expensive things are "status symbols". It appears that Musk really wants to make science fiction real, independently of what anyone else does, and I suspect Bezos of actually being obsessed with relative status. Who knows if that's fair, but that's how it looks.