TBC the "problem" is not these particular people, nor what specific things they have chosen to own/control. The problem is that such *concentration of weath* (AKA power) is possible at all at all.
The richest man owns X.
The second and third richest men control Google.
The fourth richest man owns The Washington Post.
The seventh richest man owns Facebook, Instagram, and WhatsApp.
And now the sixth richest could soon take over both Paramount and Warner Bros.
See the problem here?