Despite the current wealth inequality

It's not "despite" the gap, because the gap itself does not cause poverty. If the poorest person in the US made $75k/year (in other words, poverty completely eradicated), the size of the gap would still be pretty much exactly the same (after all, the difference between zero and 75k is nothing compared to the difference between 75k and hundreds of billions, which is the current net worth of those with the most wealth).

After all, 50 years ago, the gap was significantly smaller, but the overall incidence of poverty was much higher.

Someone's always going to have the most. And new wealth is constantly being created. And net worth is a valuation, a price tag, not an amount of cash (which is the primary reason it can go up as fast as it can--cash money simply can't do that). Given these facts, expect this gap to always exist (and almost certainly continue to widen), even after poverty is eradicated.