Permanent poverty is also a defining feature of feudalism, which is the end game of any unmanaged market economy.

That's another reason markets get a little bit of steering.

Permanent poverty is built into this economy for all but a very very lucky few. We can do better, and framing the options as market-economy (what we have) and non-market-economy (everything else) is a false dichotomy. Markets can exist without the second-guilded-age capitalism we're in right now.