As I've said previously, unless both voters don't just have a tantrum and refuse to vote when the party doesn't do what they want and the public at large don't think only 3 parties can hold power, there won't be any significant change.

If you can get those two conditions met, gloves are off, there's so many independent and smaller parties that are more free speech, less government oriented that trying to infiltrate and bribe them all would be impossible. Then you can move onto the biggest mountain, breaking the power of the civil service.