Did you read this in the referenced article:

The higher we go up into the top 0.5% the more likely it is that their wealth is in some way tied to the investment industry and borrowed money than from personally selling goods or services or labor as do most in the bottom 99.5%. They are much more likely to have built their net worth from stock options and capital gains in stocks and real estate and private business sales, not from income which is taxed at a much higher rate. These opportunities are largely unavailable to the bottom 99.5%.

Avoiding accusations of jealousy or all the rest of it: the top 0.5% does have some who built and sold their own business- but as the article says, it's more likely to come from financial shenanigans as you advance up the ranks, and taxed at a lower rate than others have to pay. These people are essentially parasitic, sucking wealth from the labors of those who actually do useful work in exchange for little of value to anybody except themselves. Having fully picked over the blue collar scene, now they're moving onto the middle class. It doesn't matter whether you're part of the 1% or not: common sense shows parallels to Robin Hood and causes of revolution. The fact that so many 1%ers are too stupid to see what their greed is going to cause, just confirms that these people aren't even all that smart or deserving. Most parasites know not to eat the host to death while they're still needed, or to harass them so excessively that the host bites a chunk out of themselves to get rid of the parasite. The 1% human parasites seem to think they can suck greedily forever. We shall see, unfortunately.