Left wing economics

[I Shrugged]

If I were to ask a left or progressive person to lay out their vision for a successful economy, what could they say?

My main question would be something like, "Do you accept that prosperity means producing more than you consume? If you agree, how do you propose to accomplish that?"

It would be a good question to ask of any party. Based on available evidence, the Republicans and other conservatives would have a tough time convincing anyone that they have the answer, either. But let's stick to the left for the moment. Can anyone on the left offer a cogent vision of how to achieve prosperity? Are there examples of how their ideas have worked, or failed?

Is my main question flawed, or is it the right question? I see it as the central question for all governments. Because everything flows from prosperity, or lack of it.