Thucydides, a majority cannot rule on what is moral and what is wrong. The majority cannot vote to penalise, parasitise or destroy a minority and claim that it is therefore just. My personal liberty is a unalienable right, which I mustn't ever allow to be taken away.
The government is my mentor? My mentor for what exactly? How to eat? I understand my own body better than a bureaucrat in Washington or Whitehall. How to work? I understand my capabilities better than a politician or bureaucrat in Washington or Whitehall. How to manage my finances? You must be joking- look at the national finances! How to enjoy myself? I know what pleasures me better than a politician or bureaucrat in Washington or Whitehall.
Who can mentor me on how to live? Other people can tell me how they live, what they enjoy, what they regret. The government is an inhumane sum of human parts; as an individual, every MP, Senator and Congressman can tell me a great deal about themselves, and I can listen or not, but as a total, they know nothing, yet still wish to force everything. The person who can best advise me on my wishes is me myself.
Government by consensus is evil. It involves the destruction of countless minorities' interests to go along with the biggest minority. Government by any other means is impractical, so we hit a necessary evil. Let's minimise the scale of this evil, rather than asking it to force us to act as it sees fit.