>That simply can't be fair.
This word "fair" keeps being thrown about in these discussions.
All such discussions are useless unless the people involved specify what they mean by "fair". And I'll give you a hint: You'll find many people will disagree with your definition (and there isn't consensus on any one definition).
A simple example: Fairness in equality vs fairness in proportion. The former is about everyone having equal services/wealth/etc (usually aligned with far left), and the latter is about everyone having these in proportion to their efforts (usually aligned with far right).
Neither is right or wrong.
High wealth inequality, while often correlated with lower opportunities, does not fundamentally imply it - it is not a causation. Using it as a metric is a poor choice. Instead, the metric should be what the lowest N% have access to, regardless of the wealth inequality. You can get low wealth inequality where everything is bad for everyone, or high wealth inequality where only a few "suffer".
Just saying something is "unfair" without explanation is merely an attempt at making an emotional argument. It is identical to just saying something is "wrong".