It is better to settle our disputes by casting a vote

Freedom, to a large extent, relies on being able to safely disagree with people and this is one of the advantages of democracy. Without democracy it is possible for people to make property claims which are controversial and unresolved. With democracy we have a means to settle disputes of this kind. It is better to be able to settle our disputes (and even to decide which group is the most powerful) by means of casting a vote rather than to actually engage physically.

We can assume that parliamentarians have more interest in protecting parliament than typical people and that people in government are more inclined to socialism than typical people, merely because they would be the first people to get the money. Democracy is liberating when compared to governments without democratic accountability (not compared to anarchy). Democracy tends to enhance liberty and reduce collectivism because the people are further from the government than the politicians. If there is less democracy (as with first-past-the-post) this protects parliament from the voters which will reduce freedom.

Freedom is derived from being able to safely reject other people from themselves and their (your) property and this is why democracy is liberating. The more democracy the state is accountable to the more freedom the people will have.