I wasn't the original commenter, but I don't think when they said "owner class" they meant passive minority shareholders with $200K portfolios or people with some money in their 401Ks.

While some of the richest are certainly entrepreneurs, the largest percentage of Forbes 400 are people who got there with OPM, other people's money, like hedge fund managers. Another chunk are heirs like Waltons or Kochs. Did Waltons get something for nothing without any risk? I would say yes, they did.