Murdoch isn't already a rich person controlling large channels of communication? Bezos isn't already a rich person controlling a large channel of communication?

Murdoch isn't already a rich person controlling large channels of communication? Bezos isn't already a rich person controlling a large channel of communication? All of these channels are controlled by rich people. Who is controlling the lobbyists? Who is financing political parties/campaigns. This is the cost of oligarchy. Absolute power corrupts absolutely. I don't know how we get out of this spiral. I think a huge tax on digital ad revenue would help make these channels more organic and less contentious but I really don't know.