What does this have to do with anything? Most of
the West (let alone most of the rest of the world) is far better off than it was even just 50 years ago by almost every single metric you can conceive.
It's hard to believe it's due to financial games exclusively: people are better off in real terms.
Inequality is a problem because when members of your community are living in very different conditions, the cohesion of said community is undermined, but worrying about inequality is the archetypical first world problem: a problem nonetheless, but a problem that presumes you've come a long way.