This is wandering away from the topic a bit. I doubt anyone could make a good case for any of:

• taxes are inherently harmful and always misspent
• taxes are always spent wisely
• there exists any political system under which immensely rich people couldn't wield a lot of political power to try to further enrich themselves.
• the immensely rich bother to conspire for any other purpose or actually care about politics much beyond what it can get them personally
• there is literally nothing a democratically elected government can or will do to limit the political power of the immensely rich in any way.