Arguably, we don't. The people who are currently supported by representative democracy wouldn't like that to happen. Having direct democracy with instant recall of delegates will likely not be accomplished any time soon, due to "the powers that be" lobbying against it. And if it ever were to succeed, they'd up the advertising game to mislead and misinform people more than is already done.
Perhaps I am cynical, but I do not believe that a system which benefits the average person, the vast majority, can be accomplished in a system where the profit motive exists which is in most cases a direct contravention to the long-term wills of humanity, that is, our safe continued existence, and maintaining a relatively free way of life.
Edit: also worth looking at what has happened with previous campaigns to make the voting system fairer; in the the UK, the alternative vote referendum was opposed by those parties which drew large gains from FPTP, namely the Conservative Party. Their website compared the AV to a system in which your child wins an egg and spoon race, but he isn't given the trophy.
Perhaps I am cynical, but I do not believe that a system which benefits the average person, the vast majority, can be accomplished in a system where the profit motive exists which is in most cases a direct contravention to the long-term wills of humanity, that is, our safe continued existence, and maintaining a relatively free way of life.
Edit: also worth looking at what has happened with previous campaigns to make the voting system fairer; in the the UK, the alternative vote referendum was opposed by those parties which drew large gains from FPTP, namely the Conservative Party. Their website compared the AV to a system in which your child wins an egg and spoon race, but he isn't given the trophy.