Not really. The level of wealth required to reasonably make a purchase like this is what? 20 million? That's not 'stratospheric'. It's richer than I am, to be sure. But it's only between 2 orders of magnitude richer than your average software engineer's annual salary. I think that's a pretty reasonable level of wealth inequality, and not really indicative of much at all.
> If there is real scarcity because of climate change or other widespread disaster, how much can a piece of this ‘quality’ be sold for? A loaf of bread, or less?
Your point here proves the exact opposite of what you think it does. The fact that people can invest vast resources in things that aren't immediately useful for survival is an incredible testament to the stability and productivity of our economy. Because you're right, if people thought there was any significant chance of things going mad max, they certainly wouldn't be investing in art.
> That millions of children still starve but a piece of simplistic art is worth more than the value of food a whole village consumes in a decade is a sorry effect of the financial system we use or the way our society assigns ‘coolness’ score to people and activity.
Is it? Or do prices simply reflect our personal valuations of things? Which is to say, every decision each of us makes of what to do with our individual time and money sets a price. When you wrote this comment, you chose to invest your free moments in it, rather than earning money to donate to the poor. Is that a sad commentary on the state of the world? Or is it just the natural consequence of people being allowed to allocate their own resources?