I'm saying Ds and Rs won't change the voting system themselves. The only way they'll change is if we stop voting for them. As more and more of us do that, they'll either change their tune, or another party will replace them.
The way I see it, we're fixated on this idea that it's some kind of privilege to choose which of two crappy candidates is elected. If both are crappy, I don't care which one wins. I'd rather cast my vote for someone decent and build support for a real alternative. Even if it doesn't pay off this election, it will influence the next.
If we just keep doing the same thing, keep playing the same game over and over again, it will just continue to get worse.