We cannot stop the government with fptp

The purpose of democracy is to enable the people to veto and reject the actions of the government. Democracy enables the people to stop the government. But if we do not have proportional representation it becomes very difficult to stop the government. If both of the main parties share similar policies the people are not able to stop those policies. If they seek to stop the shared policies (of the two main parties) they will waste their vote. (The only effective votes endorse socialism.) The government cannot be stopped when fptp is used. With pr voters are able to stop the government because they can vote for a candidate who does not agree with the proposed government intervention. It is not certain that pr will result in freedom but it is a possibility which it is not under fptp.