We Need to Win the Debate
Maybe its just my naive understanding of history, but some of the biggest advances for liberalism in the last hundred years were about more than a single issue. The New Deal resulted in liberal legislation on a whole host of issues. Similarly, the Great Society also resulted in liberal legislation on numerous fronts.
What did both the New Deal and Great Society have in common? They were based on a broad liberal philosophy that allowed Democrats to fight for their goals. Single payer, while a noble effort, will probably not succeed without a more thorough liberal political philosophy winning over the current "Fuck-you society" philosoph of Bush/Obama/GOP/Dem. The best way to combat "conservative populism" is with a well articulated liberal philosophy. And with so much wrong as a result of conservativism, it shouldn't be hard.