That's coming. We don't have those candidates now, not real ones who get elected. They all eventually get bought, one way or another. It's a chicken-and-egg problem. So we have to first buy some effective candidates (by giving them an alternative way of being funded rather than corporatists) to pave the way for candidates later on who simply stand up to do the right thing, get noticed, get elected, make the changes.
I think what Lessig is planning is a new style of ad campaign that moves past the attack ad developmental phase that we seem to be stuck in. The money isn't just to buy attack ads for reformers to defeat opponents. It's to change the way campaigns are run with new styles of ads and reaching out to people, holding candidates accountable after election, removing some of the burden of their incessant fundraising. Generally changing the demeanor of how an elected official behaves. That's the hope. We aren't there yet. This is just the first step in a long chain of stuff that has to happen piece by piece.
I hate our political system. It's so corrupt. It's not the worst, because a lot of it is out in the open. But in another sense, with the way much of the corruption is out in the open is like living in a garbage dump with stinky stuff everywhere. It's nasty.