Disadvantages about plutocracy

Since Plutocracy is a government ran by the wealthy, there could be a few disadvantages but also there could be some advantages, also.

Disadvantages:

Wealthy People running a government can be a bad idea. They could make people pay more money for taxes, and they could make people pay more for cars and anything in stores.

Advantages:

Wealthy people running a government could also be a good idea. Knowing that wealthy people can cherish their money and not want to give it away, they could higher people to make money for them so that there will be less taxes and more money towards employed people.