> You believe that the onus of arguing ethics is on the people who want to change the status quo when really, we should start by thinking about what society ought to look like from first principles. And then you absolutely do have to give arguments for why you want any inequality to exist in the first place, let alone billionaires.[0]
Interesting challenge, taking a look at the need for inequality based on first principles. Let me attempt my hand at it.
If you look at a capitalist economy as an optimization mechanism, large wealth concentrations are sources for large jumps in the solution space that escape local maximums. Explaining why:
Start by ignoring the comfort providing aspect of wealth. At these levels, wealth is more about power to shape society than it is about personal comfort. On the personal comfort scale, you get diminishing returns as you spend more.
In terms of shaping society, a billionaire has more power than a millionaire. Whereas, for a large project, a millionaire must convince other millionaires to share the risk, a billionaire may throw himself on a tangent all on his own.
This single-mind behaviour, when compared to group-mind behaviour, produces solutions that are a lot different from the status quo. In terms of optimization, they are larger jumps in the coordinate space.
Now, these large jumps in the solution coordinate space may be beneficial, may be dangerous, or altogether innocuous. Most are innocuous, some are wildly positive (Tesla pushing the auto market to move towards electric traction), some are wildly negative (Koch brothers capturing government).
The question of whether the final balance is positive or negative is an extremely difficult question. We're talking about very rare events in the optimization of very complex systems.
So, I have a very nice, useless theory :-)