That would be a tiny bit difficult to do considering that any change to the way votes are tallied would have to be introduced on voted on by the very same people who benefit who benefit from the current system. Such a thing will have to come from a grassroots movement who could actually propel representatives who think of more than themselves and the special intrests in their districts - and it won't happen tomorrow or the next day - it will take much time, effort, and resources... something the parties in power have tons of already.