By 'liberism' do you mean Liberalism or Libertarianism? It sounds like you wouldn't be able to vote in the world that you have conjured up...I would base the opportunity to vote on a score, a mandatory test which evaluate many subjects like taxes, economy, sociology, trade and history at least.
Someone who cant tell the difference between liberism and socialism or doesnt particularly know what feminism is and how feminists behave shouldnt be allowed to vote.
Needless to say that criminals and people which didnt work or ever paid a single tax in their life shouldnt be allowed to vote either, its not the amount of money paid but the principle, someone who doesnt fullfil his duties shouldnt have the same rights of someone who does.