If you want to delve into the creation of this list, it is in different industries that they could not inherit it from. In other words, Zuckerberg more than likely came from a top 1% family. But he didn't inherit wealth from them. It was a spring to allow him to use his abilities to earn income in a different industry.
Today, the top 1% of income is ~400k. Yup, a decent doctors salary. When you start naming off people whose families were doctors, then . . . well . . . yeah, they had a silver spoon.
The problem with the Forbes list where they are ranking them like that is that it doesn't correlate with new industries and new tax laws regarding inheritance.
My point is that sure, Ellison, Zukerberg, Bezos all benefited from one thing: A new industry. Some of them were fortunate to be able to use their upbringing and then run with it. But start to think about this. When did they start with computers? Wanna bet that mommy/daddy bought them one when they were a little kid. While it may be common now to get a kid his own computer, go back to the mid 1980s. That wasn't happening. Fuck, my mother didn't buy me a computer, I earned income and went and bought one when I was 15. I earned the nearly 3k for it. My mother didn't have $300 to spend on me for that. Thus . . . the opportunity. Sure, I created my own opportunity, just like Adelson did by borrowing $200. But not everyone has that same opportunity. That is the point of this whole conversation. There will never be absolute equal opportunity. But the delta between opportunity and not should be lessened.