Let's get really practical: public-only financing of elections, plus conflict of interest rules with teeth (no job in the industry you regulated for X years after you left) will make it significantly harder for special interests to exert undue influence on our elected officials. At least, if they sell out to corporations, it will be out of deeply felt corporatist convictions rather than for intellectually bankrupt cash considerations.
Let's get really practical: public-only financing of elections, plus conflict of interest rules with teeth (no job in the industry you regulated for X years after you left) will make it significantly harder for special interests to exert undue influence on our elected officials. At least, if they sell out to corporations, it will be out of deeply felt corporatist convictions rather than for intellectually bankrupt cash considerations.