The problem isn’t necessarily that some one can buy a seat for themselves (though some people out there could spend 1000x as much as half a billion and still have 500 billion to spend), it's that for less than half a billion, someone can buy 20 house or senate seats for more conventional candidates that are willing to vote the way the financier wants.

Not to mention that the Norwegian Pension Funds holds $2 trillion in assets. UAE and KSA have ones over $1 trillion each.

And that's ignoring that currently an even smaller group of people owns everything, who don't even represent the public on paper. Quite stupid to assume that this is a better idea.