The US has been the greatest bootstrapper of poor people into middle class and wealth history has ever seen. The US was populated by poor immigrants with little more than a suitcase. Wealthy people didn't immigrate to the US. Look at the statistics on height, longevity, and infant mortality from 1800 to today. It's a little hard to argue that the free market impoverished people.
As for healthcare, that has not been a free market in the US at least since WW2.
The linked PDF talks about how, 50+ years ago, President Lyndon Johnson declared an "unconditional war on poverty in America."
Yet as of the publication date, 31st December 2006, data indicate that more than 12 percent of U.S. residents still live below the poverty line.
For 2006, a family of four was considered in poverty if its annual income fell below $20,444. For a couple under age 65, the poverty threshold was $13,500, and for an individual living alone, it was $10,488.
As for healthcare, that has not been a free market in the US at least since WW2.