Do you happen to have a recipe for a corruption-free government? Please share.
Make lobbying illegal, and make representatives more accountable to their constituents? Decentralize the government more, and make it more state and local instead of federal?
Easy first step: prosecute criminals even if they're in your own political party and especially if they aren't little people.
Step zero is then to get people in power who are willing to do that. How do you propose we go about that step?
You don't need to go far back in history to see when the US government broke up monopolies.