"And, in most cases arn't I required to exchange a whole lot of my available labor in order to make ends meet?"
Yes. You need to do things that make other peoples lives better if you want other people to do things that make your life better.
What has lead you people to think the opposite of this is the more moral position?
"I would expect the most powerful anti-poverty economic tool to have clear and demonstrable gains against poverty..."
Scoreboard. Seriously, the story of the 20th (and 21st) century eradication of poverty is told over and over again. How have you not seen any of it? You need to honestly answer that to yourself. How. Have. You. Not. Seen. ANY. Of. It?
"...obvious implementation..."
What you mean here is that you want to see the control board that is used to dial up capitalism with a resulting reduction in poverty. That's how anti-capitalists do things. They command and control. That is not how capitalism and emergent order works. It is a system that cannot be fully realised within any individual person's brain.
Market capitalism is akin to a neural network with a billion features, a billion hidden layers with a billion modes in each, a billion output nodes, which is constantly training on new and old data. Anyone who claims to be able to control the result with any sort of precision should be laughed off the planet.
"... and very few detractors."
Ha! Would you ever place that same requirement on your own preferred economic system? No way! The people who are against your system are blinded by ideology, right?