The Koch brothers, as far as I've seen, have been accused of corrupting politicians so they can maintain their wealth. By buying people seats, the Koch brothers ensure that they get things they want, but they keep the system we have in place. If our government didn't expand it's power so much the last 100 years, they would have to compete like business people should in an open market rather than capitalize on cronyism we have now.

Soros, on the other hand, has stated that he wants to turn the U.S. government on its head. He wants chaos which he can use to implement the system he personally sees fit. He wants a socialist dictatorship. He wants to be our Castro, Mao, Stalin, take your pick.

Both are wrong, but what Soros wants is something that can't be fought in the ballot box, which is why he's so dangerous.