Make one mistake filling out a form and you are a criminal. Even after jumping though all the government hoops, the amount you can spend to get others to hear you is in many case limited to a few hundred or a few thousand dollars. This is but one example of how we all live under the guns of the politicians and bureaucrats. In some communities, you are a criminal if you paint your living room without gaining the consent of the bureaucrats. The basic flaw in our system of government is that it is far too easy to pass a law authorizing the use of force and violence to achieve a goal.
New faces come to political office.
One political party wrests control of government from another. Third parties spring up promising alternatives. The only new party to establish itself was the Republicans. It was not a third party. It replaced the second party that had collapsed.