When people talk about gaps between the super-rich and everyone else, it's usually followed by the suggestion that it's somehow not right that one person has twenty billion dollars to their name, and the other person has fifty thousand.
What's odd to me is that the disparity itself is taken to be unjust, with no further details needed. No need to talk about the work, effort, capability, sacrifices or lack thereof of either party. The disparity is enough for many people to say 'the wealthy guy should split his share 50-50 with the less wealthy guy!'
If there's anything truth in the writings of that jackass Rand, it's in regarding attitudes like the above as not just immoral, but literally subhuman. There's no intellectual content there - just base and simple envy.