Yes, yes and yes. People are sometimes surprise why people who has a lot of money seem to be left-leaning and support things like higher taxation. First, it is never a concern for them. If they need, they offshore their money or pay lawyers who know tricks or start some foundation to pass money through it.

Something that people from middle class are not able to afford.

The other reason is that making difficult for members of middle class to accumulate wealth secures their own business, they are effectively killing the growth of potential competitors.

In the longer perspective this is very dangerous, it creates oligarchy, which, in turn, has all the incentives to restrict free market, free speech and democracy.

Middle class is important for the society since those are people who have time to engage themselves into public affairs, they don't have to spend all their time trying to earn money. In addition middle class is much more numerous than 1% of the wealthiest. As a result they give work to a lot of people who are down the social ladder. Both Mark Zuckerberg and some Mr. Jones, who owns a grocery shop employ a single babysitter, need a single plumber to fix their pipes, are able to eat the same amount of food, etc. So thousands of Jones are given job to much more people than single Mark Zuckerberg (obviously I am talking about Zuckerberg as a person, not his company).

That's why from the social perspective it is important to have as many Mr. Jones as possible. They give work to a lot of people, they drag them up. That's why taxing heavily middle class is a terrible idea and all the "tax the rich" regulations in the end mean "tax those who cannot escape taxation".