The top 0.1% consists mostly of top 1% folks having a windfall, and the top 1% is mostly top 10% folks having some good years. These aren’t really separate and distinct classes of people as is popularly imagined > The performance gap between the top 1 or 0.1 percent versus the top 10 percent is actually larger than the gap between those right at 10 percent and any part of the bottom 90 percent.
They aren't "separate" in that we're not literally a feudal society. Sure, I can agree that an ordinary engineer has a chance of making it big on stock options and becoming a multi millionaire.
But that's not common. It's like winning the lottery. You can't plan to join a startup that will make you a millionaire, especially if you aren't a software engineer or aren't living in silicon valley. And for everyone else, the gap between the 0.1% and the 1% and the 10% is widening.